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Khallaf, Nagwa ,  El-Ansary, Samy ,  Hassan, Mohamed ,  [Acute respiratory infections : sentinel survey in Egypt / Nagwa Khallaf, Samy El-Ansary, & Mohamed Hassan]

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.]]

Regional Committee for Africa, 59 ,  [Policy Orientation on the Establishment of Centres of Excellence for Disease Surveillance]

Regional Committee for Africa, 59 ,  [Policy orientations on the establishment of centres of excellence for disease surveillance, public health laboratories, food and medicines regulation]

World Health Organization. Regional Office for Europe ,  [WHO Regional Office for Europe guidance for influenza surveillance in humans]

Comité Regional Africano, 44 ,  [Erradicação da dracunculose]

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]