542,998 CONTROL Control of vitamin A deficiency and xerophthalmia : report of a joint WHO / UNICEF : /United Nations Children's Fund/ / USAID : /US Agency for International Development/ Helen Keller International IVACG : /international Vitamin A Consultative Groupé Meeting. — Geneva : WHO, 1982. — 70,/37 s., /4/ s. tabl. : wykr. ; 21 cm (Technical Report Series / World Health Organization ; 672) ISBN 92-4-1206-72-01