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Authors & references
Author:
Edited by Erland Hermansson based on Forest Biofacts Book 8 Chapter 9 (Pages 350-354) original content by author Hannu Paulapuro.
References
Wahlström, P.B., Pulp Paper Mag. Can. 61(8):T379 (1960); 61(9):T418 (1960).
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