type: book chapter

year: 1987

author: Okołów Cz.

title: Influence of forest management on effectiveness of natural factors limiting the number of the great spruce bark-beetle (Ips typographus L.) – preliminary communication.

book title: IVth Symposium on the Protection of Forest Ecosystems, Rogów 25-26 November 1986.
publisher: Warszawa•pages: 191-195

short citation: Okołów 1987b