Books by P. W. F. de Waard
Problem areas and prospects of
Problem areas and prospects of production of pepper
Agricultural, technological, a
Agricultural, technological, and economic aspects of some selected medicinal plants
Foliar diagnosis, nutrition an
Foliar diagnosis, nutrition and yield stability of black pepper (Piper nigrum L.) in Sarawak
Pepper (Piper nigrum L.).
Pepper (Piper nigrum L.).