Electronic collection of historic United States Department of
Agriculture (USDA) publications related to organic agriculture,
containing almost 200 documents published before 1942 that contain
state-of-the-art information and data that is still very pertinent
for today's agriculture.
Research Institute of Organic Agriculture (FiBL), Frick/Switzerland,
Stiftung Ökologie und Landbau / Foundation Ecology & Agriculture
(SÖL), Bad Dürkheim/Germany