5 literature references for Didymodon humboldtii E. Hegewald & P. Hegewald, 1977:

Author: Bescherelle in Renauld & Cardot
Year: 1905
Title:
Source: Bull. Soc. Roy. Bot. Belgique
Author: Jaeger
Year: 1872
Title:
Source: Ber. Thatigk. St. Gallischen Naturwiss. Ges.
Author: Britton
Year: 1915
Title:
Source: Bull. Torrey Bot. Club
Author: Crosby, M. R. and others - USED
Year: 1999
Title: USED in a checklist or nondescriptive flora, citing collections, since 1963
Source: Checklist Mosses
Author: E. Hegewald & P. Hegewald
Year: 1977
Title:
Source: Nova Hedwigia