World Health Organization & Cassel, J. (1970). The Education and training of engineers for environmental health. World Health Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Health Organization και John Cassel. The Education and Training of Engineers for Environmental Health. Geneva: World Health Organization, 1970.
Παραπομπή σε μορφή MLA (8th εκδ.)World Health Organization και John Cassel. The Education and Training of Engineers for Environmental Health. World Health Organization, 1970.
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