A concise bibliography and a more complete bibliography describe Modula-3 related books, technical reports, and papers. The definition of Modula-3 is contained in: "System Programming with Modula-3" also known as SPwM3. Sam Harbison has written a more tutorial book titled Modula3.
Three main Web servers contain Modula-3 related information: www.m3.org, DEC SRC Modula-3 home page, and Ecole Polytechnique de Montré Modula-3 home page.
The Usenet newsgroup comp.lang.modula3 is the official meeting place for Modula-3 related discussions.