Building Research Establishment. (1977). A Handbook of softwoods (2nd edition.). H.M.S.O..
Chicago-viite (17. p.)Building Research Establishment. A Handbook of Softwoods. 2nd edition. London: H.M.S.O., 1977.
MLA-viite (9. p.)Building Research Establishment. A Handbook of Softwoods. 2nd edition. H.M.S.O., 1977.
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