000 00302nam a2200121Ia 4500
100 _aWHO
020 _a92-4-158022-4
942 _cBK
245 _aInternational travel and health : Vaccination requirements and health advice
260 _aauth., Geneva
_c1997
082 _a341.765 WHO
300 _a106p
999 _c33954
_d33954