Vortrage der wiss. Tagung der Forschungskooper. "Tierzuchtung" und "Tierenahrung" der Akad. der Landwirtschaftswiss. der DDR vom 5. bis 7. April 1978 in Niengagen
(1978)
Festschrift zur Feier des 20 jahrigen Bestehens und der Einweihung der Neubauten des Inst. fur biologische Schadlingsbekampfung der Biologischen Bundesanstalt fur Land- und Forstwirtschaft in Darmstadt am 11. April 1973
(1973)
Proc. of an International Symposium "Practical aspects of controlled atmosphere and fumigation in grain storages" held from 11 to 22 April 1983 in Perth, Western Australia
(1984)
International joint conference of the American Geographival Society and the American Division of the World Academy of Art and Science, April 27 - May 2, 1970
(1971)
Proc. of a Symp. on the effects of radiation on cellular proliferation and defferentiation organized by the IAEA in co-operation with the Joint Commission on applied radioactivity and held in Monaco, 1-5 April 1968
(1968)
