Ledford, Janice K. Certified ophthalmic assistant exam review manual / COA exam review manual by Janice K. Ledford - Thorofare, N. J. : Slack Inc., 1997 - 202 p. : ill. ; 26 cm. - The basic bookshelf for eyecare professionals ; 1 . ISBN: 1556423330 RM125.29 LCCN: 96-044190 Subjects--Topical Terms: Ophthalmic assistants--Examination questions National Library of Medicine Call No.: WW18.2