545,747 EHLERS NIELS, KAAE SIGVARD Effects of Ionizing radiation on retinoblastoma and on the normal ocular fundus in infants : a photo graphic and fluorescein angiographic study / by Niels Ehlers and Sigvard Kaae. — Copenhagen : Scriptor, 1987. — 84 s. : il., wykr. ; 25 cm (Acta Ophthalmologica ; suppl. 181) ISBN 87-7264-003-0