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Cullen, J. R ,  Chitpraprop, Udom ,  Doberstyn, E. B ,  Sombatwattanangkul, Kitsiri ,  World Health Organization ,  [An epidemiological early warning system for malaria control in Northern Thailand / by J. R. Cullen ... [et al.]]

Robin, Y. ,  WHO Expert Committee on Yellow Fever ,  World Health Organization ,  [WHO expert committee on yellow fever [meeting held in Entebbe from 9 to 15 March 1971] : methods of surveillance for yellow fever - serological studies in wild and sentinel animals]

Göckel, C. W ,  World Health Organization ,  [Principles in reporting on surveillance operations / by C. W. Göckel]

Göckel, C. W ,  World Health Organization ,  [Principes à suivre pour l' établissement des rapports concernant les opérations de surveillance / par C. W. Göckel]

Cullen, J. R ,  Chitpraprop, Udom ,  Doberstyn, E. B ,  Sombatwattanangkul, Kitsiri ,  World Health Organization ,  [An epidemiological early warning system for malaria control in Northern Thailand / by J. R. Cullen ... [et al.]]

Göckel, C. W ,  World Health Organization ,  [Principes à suivre pour l' établissement des rapports concernant les opérations de surveillance / par C. W. Göckel]

Göckel, C. W ,  World Health Organization ,  [Principles in reporting on surveillance operations / by C. W. Göckel]

Robin, Y. ,  WHO Expert Committee on Yellow Fever ,  World Health Organization ,  [WHO expert committee on yellow fever [meeting held in Entebbe from 9 to 15 March 1971] : methods of surveillance for yellow fever - serological studies in wild and sentinel animals]