2 literature references for Anomobryum polymorphum Dixon, 1938:

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: Dixon
Year: 1938
Title:
Source: Notes Roy. Bot. Gard. Edinburgh