1. Meteorological aspects of changes in spraying techniques;Adams,1978
2. La baisse de la diversité specifique dans la flore des terres cultivées;Aymonin,1976
3. Zero-tillage;Baeumer;Advances in Agronomy,1973
4. ‘Alluvial meadows’: A comparative study of grazed and mown meadows;Baker;Journal of Ecology,1937