Enlace original:
https://apps.who.int/iris/handle/10665/52212
Goh, Kee Tai
,
Doraisingham, S
,
Tan, K. L
,
Oon, C. J
,
Ho, M. L
,
Chen, A. J
,
Chan, Shih Hung
,
[The hepatitis B immunization programme in Singapore / K. T. Goh ... [et al.]]