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J. A. Hellen
Identifiers
Open Library
OL2017058A
Top Subjects
Zambia (1)
Agriculture -- Economic aspects -- Zambia (1)
Zambia -- Economic conditions (1)
Natural resources -- Zambia (1)
North Rhine-Westphalia (Germany) -- Economic conditions. (1)
North Rhine-Westphalia (Germany) -- Economic policy. (1)
Cattle, diseases (1)
Books by J. A. Hellen
Total count: 6
Rural economic development in Zambia, 1890-1964.
Weltforum Verlag
1968-01-01
North Rhine-Westphalia
Oxford University Press
1974-01-01
Human Helminthiases in the Philippines
The Epidemiological and Geomedical Situation
Springer London, Limited
2012-01-01
Dengue Haemorrhagic Fever in Thailand
Geomedical Observations on Developments over the Period 1970-1979
Springer
2012-01-01
Kenya
A Geomedical Monograph
Springer London, Limited
2013-01-01
Brucellosis
Distribution in Man, Domestic and Wild Animals
Springer London, Limited
2013-01-01
