@ARTICLE {CARDWELL:1997a,
title = {A systems approach to assess crop health and maize yield lossess due to pests and diseases in Cameroon},
author = {Cardwell, K. and Schulthess, F. and Ndemah, R. and Ngoko, Z. },
journal = {Agriculture, Ecosystems and Environment},
year = {1997},
volume = {65},
number = {1},
pages = {33--47},
issn = {0167-8809},
}