type: book chapter

year: 1987

author: Szyszko J.

title: Analysis of the occurrence of Blastophagus spp. (B. piniperda, B. minor) in the forest district Niedźwiady in the years 1977-1984.

book title: IVth Symposium on the Protection of Forest Ecosystems, Rogów 25-26 November 1986.
publisher: Warszawa•pages: 75-85

short citation: Szyszko 1987a