Szegi József (szerk.): Proceedings of the 9th International Symposium on Soil Biology and Conservation of the Biosphere 1. - Proceedings of the International Symposium on Soil Biology and Conservation of the Biosphere 9/1. (Budapest, 1987)
PROCEEDINGS OF THE 9th INTERNATIONAL SYMPOSIUM on SOIL BIOLOGY andCONSERVATION OF the BIOSPHERE VOL.1 EDITED BY J. SZEGI AKADÉMIAI KIADÓ, BUDAPEST