Resin canals in the Canadian spruce (Picea Canadensis (Mill.) B.S.P.) :
an anatomical study, especially in relation to traumatic effects and their bearing on phylogeny /
by Robert Boyd Thomson and Harold Boyd Sifton.
APA Citation
Thomson, R. Boyd., Sifton, H. Boyd. (1925). Resin canals in the Canadian spruce (Picea Canadensis (Mill.) B.S.P.): an anatomical study, especially in relation to traumatic effects and their bearing on phylogeny. London: Royal Society of London.
MLA Citation
Thomson, Robert Boyd, 1870-, and Harold Boyd Sifton. Resin Canals In the Canadian Spruce (Picea Canadensis (Mill.) B.S.P.): an Anatomical Study, Especially In Relation to Traumatic Effects And Their Bearing On Phylogeny. London: Royal Society of London, 1925.
Warning: These citations may not always be complete (especially for serials).