Cone crop fluctuations in Scots pine and Norway spruce
By: an investigation based on the cone counts carried out by the National Forest Survey in the years 1954-1962 and on the reports submitted by Forest Service rangers on the cone setting in the years 1909-1961
Series: Studia forestalia Suecica -- nr. 33
Publisher: Skogshögskolan
Published: 1965
Place of publication: Stockholm
Language: eng
Number of pages: 21
Subjects: Seed industry and trade; Statistics; Scots pine; Norway spruce; Forests and forestry
Notes: Title also in Swedish; summary in Swedish.

Bibliography: p. 20-21.