共 25 条
[1]
Ayim E N, 1974, East Afr Med J, V51, P246
[2]
CHASTEL C, 1969, Revue d'Hygiene et de Medecine Sociale, V17, P367
[3]
COCKBURN WC, 1970, B WORLD HEALTH ORGAN, V42, P405
[5]
COLLIS W R, 1961, West Afr Med J, V10, P217
[8]
POLIOMYELITIS - SEVERITY AND TYPE OF DISEASE IN DIFFERENT AGE GROUPS
[J].
ANNALS OF THE NEW YORK ACADEMY OF SCIENCES-SERIES,
1955, 61 (04)
:956-967
[9]
Huckstep R L, 1970, Physiotherapy, V56, P347
[10]
KRUGMAN S, 1968, INFECTIOUS DISEASES, P66