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WHO Study Group on BCG Vaccination Policies ,  World Health Organization ,  [BCG vaccination policies : report of a WHO study group [meeting held in Geneva from 24 to 27 June 1980]]

Helmer, Richard ,  Hespanhol, Ivanildo ,  World Health Organization ,  [Water pollution control : a guide to the use of water quality management principles]

Ahuja, A. S ,  World Health Organization ,  WHO Inter-Country Seminar on Surveillance in Smallpox Eradication (1972 : New Delhi, India) ,  [Encourage and appreciate immediate reporting of smallpox : methods to determine the efficacy of the programs / by A.S. Ahuja]

Rao, A. R. (Ayyagari Ramachandra) ,  World Health Organization ,  [Clinical smallpox classification and frequency of type of variola major / by A.R. Rao]

Basu, R. N ,  Kashem, Joarder Abul ,  Khan, Aftabuddin ,  Arnt, Nilton ,  World Health Organization ,  WHO Inter-Country Seminar on Surveillance in Smallpox Eradication (1972 : New Delhi, India) ,  [Present status and future plan of smallpox eradication programme in India / by R.N. Basu]

Aphale, R. V ,  World Health Organization ,  WHO Inter-Country Seminar on Surveillance in Smallpox Eradication (1972 : New Delhi, India) ,  [Conquest of smallpox in Maharashtra State : containment and follow-up measures : failures and achievements / by R.V. Aphale]

Verma, S. D ,  World Health Organization ,  WHO Inter-Country Seminar on Surveillance in Smallpox Eradication (1972 : New Delhi, India) ,  [Methods to ascertain that smallpox transmission in an area has been interrupted / by S.D. Verma]

Singh, Ishar ,  World Health Organization ,  WHO Inter-Country Seminar on Surveillance in Smallpox Eradication (1972 : New Delhi, India) ,  [Tracing of the source of infection / by Ishar Singh]

Basu, R. N ,  Khodakevich, L. N ,  World Health Organization ,  [Programme d' éradication de la variole en Inde : surveillance exercée sur les marchés hebdomadaires / par R.N. Basu et L.N. Khodakevich]

Basu, R. N ,  Khodakevich, L. N ,  World Health Organization ,  [La Commission nationale pour l' évaluation du Programme d' éradication en Inde / par R.N. Basu et L.N. Khodakevich]