A memorial service for Dr. Ronald G. Michels, a Baltimore ophthalmologist, will be held at noon April 25 in Turner Auditorium, Johns Hopkins School of Medicine where he taught and practiced for a number of years.

Dr. Michels died Jan. 15 while awaiting a heart transplant.

Personal friends are invited to write about their relationship with Dr. Michels for inclusion in a book for his survivors, his wife, Alice, and their two children, Randy and Allison. The deadline is April 15.

The writings should be faxed to Dr. Walter J. Stark at (301) 955-0867 at the School of Medicine, or mailed to Jo Ann L. Young, the Wilmer Residents Association, Wilmer 232, Johns Hopkins Hospital, 600 N. Wolfe St., Baltimore 21205.