1
International climate protection /
Book
2
Nuclear techniques in soil plant studies for sustainable agriculture and environmental preservation : International conference on nuclear and related techniques in soil plant studies for sustainable agriculture and environmental preservation: proceedings : Wien, 17.10.94-21.10.94
Book
3
Soil quality and agricultural sustainability /
Book
4
Soil : ecology sustainable agricultural systems : [15th International Congress of Soil Science at Acapulco, Mexico, July 10-16, 1994] /
Book