IOBC-WPRS Bulletin Vol. 4 (3), 1981

Working Group: "Integrated Protection in Orchards"
Proceedings of the 1st meeting of the Subgroup on "Integrated pest and disease control in hops",
Liblice (Czechoslovakia), 26-28 August 1980.
Edited by: I. Hrdý & H. Hrdlicková [179 pp.].