System Programming with Modula-3 Edited by Greg Nelson Prentice Hall Series in Innovative Technology ISBN 0-13-590464-1 L.C. QA76.66.S87 1991 -- The definitive language reference. (on-line version)
Sigplan Notices Volume 27, Number 8 August 1992, pp 15-42 -- Chapters 2 and 3 of SPwM3.
Modula-3 Samuel P. Harbison Prentice Hall, 1992 ISBN 0-13-596396-6 -- A more tutorial look at the language
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