Verbatim text: Vitt, D. H. 1973. A revision of the genus Orthotrichum in North America, north of Mexico. Bryophyt. Biblioth. 1: 1–108.
Author: Vitt, D.H.
Year: 1973
Title: A revision of the genus Orthotrichum in North America, north of Mexico
Journal: Bryophyt. Biblioth
Volume: 1
Pages: 1–108