Source:
Bulletin of the World Health Organization [Bull World Health Organ] 1965; Vol. 32, pp. 477-502.Publisher: World Health Organization Country of Publication: Switzerland NLM ID: 7507052 Publication Model: Print Cited
Source:
Bulletin of the World Health Organization [Bull World Health Organ] 1965; Vol. 32, pp. 503-13.Publisher: World Health Organization Country of Publication: Switzerland NLM ID: 7507052 Publication Model: Print Cited