Amazon.com: Oberon
   Lists books for sale on the topic of Oberon programming. Includes descriptions of individual books, reviews and purchase information.
   http://www.amazon.com/s/url=search-alias%3Dstripbooks&field-keywords=oberon+programming

ModulaWare Modula-2 and Oberon-2 Bibliography
   Lists books, articles on programming languages Modula-2, Oberon-2, and the Oberon system; Oberon list is incomplete, but has the most important books, with direct links to Amazon.
   http://www.modulaware.com/mwbiblio.htm

Programming in Oberon
   By Martin Reiser and Niklaus Wirth. Programming guide available as scan.
   http://www.oberon.ethz.ch/WirthPubl/ProgInOberonWR.pdf

Project Oberon: The Design of an Operating System and Compiler
   By Niklaus Wirth, Juerg Gutknecht. First-hand account of design, development, implementation of language and system; main principle: only a few core features are needed to produce sophisticated computer system.
   http://www.oberon.ethz.ch/WirthPubl/ProjectOberon.pdf