Hakkila, P. (1966). Investigations on the basic density of Finnish pine, spruce and birch wood.
Chicago Style (17th ed.) CitationHakkila, Pentti. Investigations on the Basic Density of Finnish Pine, Spruce and Birch Wood. Helsinki, 1966.
MLA (9th ed.) CitationHakkila, Pentti. Investigations on the Basic Density of Finnish Pine, Spruce and Birch Wood. 1966.
Warning: These citations may not always be 100% accurate.