Bern Smith

Title: The Youngest Night Nurse
Author: Anne Durham
Publisher: Harlequin
Published: October 1966, ©1966
Illustrator: Bern Smith

His signature is in the upper left-hand corner.

Beth Halliday didn’t know how she could have coped with all the bewildering details of hospital life without the kindly help of the Senior Surgical Registrar, Desmond Angrave … but she must beware of feeling too grateful to him, as she realized when his old friend, the beautiful Frandora Nye, became a patient in her ward.

Bern Smith

Title: Nurse Molly
Author: Marjorie Norrell
Published: 1975, ©1964
Publisher: Harlequin
Illustrator: Bern Smith

His signature runs up the left-hand side.

After Molly Patterson was jilted, she was determined never to trust a man again. But she was a very attractive girl, and more than one man was anxious to make her change her mind. Was Molly going to be able to stick to her decision?

Mort Engel

Title: Emergency Calling Nurse Mallon
Author: Jeanne Bowman
Publisher: Pyramid Books
Published: August 1965, ©1964
Illustrator: Mort Engel

He is credited on the back cover.

Beautiful Marjory Mallon welcomed the surging drama of her new job at Southern Emergency Hospital, for it helped her forget a private sorrow and a crushed romance. But as the young nurse plunged herself into the hectic routine of critical accidents and crucial operations, she found that her own heart was imperiled by the attentions of a handsome intern and a dashing resident ...

Tom Miller

Title: Debutante Nurse
Author: Lois Hobart
Publisher: Paperback Library
Published: September 1962, ©1959
Illustrator: Tom Miller

He is credited on the back cover.

Elaine Forrest lived in two worlds. She was a Registered Nurse with an outstanding record. She was also a wealthy society girl soon to wed Bryce Thorne, a prominent lawyer. Her future was neatly planned, carefully cataloged until Dirk Yaeger shouted angrily at her: "Stop kidding yourself, Elaine. You've got to face the facts." Then he turned and stalked off into the night. Elaine was left trembling and frightened. Her professional reputation challenged, her engagement broken, Elaine was passionately involved with a man who could ruin her way of life. 

Allan Kass

Title: Obstetrical Nurse
Author: Jane Converse
Publisher: Signet
Published: June 1972, ©1972
Illustrator: Allan Kass

His signature is in the lower left-hand corner.

"I love you, Lon. I'm never going to stop loving you!" Nurse Marguerite Lowell longed to say it to Dr. Lon Webster. Longed to kindle a response in his heart. Working so closely with him, Marguerite found her attraction to the handsome young doctor growing stronger each day. And more hopeless, for Lon made no secret of his infatuation with the hospital's provocative blond receptionist. When Dr. Warren Leash, Chief of Obstetrics, proposed, Marguerite felt caught in an emotional trap. Warran was a man she deeply admired—but could she love him? Should she fight for the man she wanted—or settle for a sensible marriage? The turmoil in her heart grew, until a fateful event brought Marguerite within reach of the love she had always dreamed of ...

Allan Kass

Title: Penthouse Nurse
Author: Jane Converse
Publisher: Signet
Published: April 1974, ©1974
Illustrator: Allan Kass

This is credited by the blog Allan Kass, Illustrator of Book Covers.

Actually, it was a dream assignment—private duty nurse to wealthy Jim Orr in his lavish penthouse. But to Carrie Linden it meant only a chance to work with Ken Delaney, Jim's doctor—a chance to be near the man she secretly loved. Perhaps then their friendship might grow into something more. But Ken treated her as just an old friend and a capable, dedicated nurse. But Dr. Michael Carlisle saw her differently, and Carrie, feeling so lonely, found herself accepting his persistent attentions. Soon she became more and more drawn to the suave and handsome doctor, yet the image of Ken still haunted her daydreams. Was she a romantic fool to think that Ken would ever care for her? Or should she erase him from her life—and her heart...?

Lou Marchetti

Title: Crystal Manning, Maternity Nurse
Author: Nan Lowry
Publisher: Paperback Library
Published: July 1964, ©1964
Illustrator: Lou Marchetti

This is not credited, but is very much in his style.

As the young head nurse of a busy maternity ward, Crystal Manning often went beyond the call of duty to bring compassion to her patients. Then one of her kind gestures backfired. She was accused of kidnaping a new-born baby. Nurse Manning  needed all the help she could get at this crucial time, particularly from the two men who loved her: Lloyd Norris, a successful attorney; and Mike Dorand, the friendly young doctor with whom she worked. As a nurse, she knew that she would have to clear her name or neither man would want her for his wife.