Verbatim text: Steere, W. C. 1939c. Tortula. In: A. J. Grout, ed. 1928–1940. Moss Flora of North America, North of Mexico. 3 vols. in 12 parts. Newfane, Vt. and New York. Vol. 1, pp. 228–246.
Author: Steere, W.C.
Year: 1939c
Title: Moss Flora of North America, North of Mexico
Editor: Grout, A.J.
Book year: 1928–1940
Book volume: 3 vols. in 12 parts
Volume: 1
Pages: 228–246