J. H. Topps

1. A farming systems approach to improving draft animal power in sub-Saharan Africa; Participatory technology development for animal traction: experiences from a semi-arid area of Kenya; Socio-economic aspects of animal power: a diagnostic study in Zimbabwe

Harriet Matsaert, Boniface Mwaniki, L R Ndlovu, 1999 .

A model of the energy system of lactating and pregnant cows

P. J. Broadbent, J. M. Bruce, J. H. Topps, 1984 .

Animal foods of Central Africa.

J. H. Topps, J. Topps, J. Oliver, 1978 .