000 00500nam a2200145Ia 4500
008 200806s9999 xx 000 0 und d
020 _a 92-4-154236-5
082 _a617.7
_bWOR
110 _aWORLD Health Organization
245 0 _aVitamin A supplements: a guide to their use in the treatment and prevention of vitamin A deficiency and xerophthalmia
_cWorld Health Organization
260 _aGeneva
_bWorld Health Organization
_c1988
300 _a24 p.
650 _aOphthalmology
942 _cPRP
999 _c145799
_d145798