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
By Martin Reiser, Niklaus Wirth; ACM Press, 1992, ISBN 0201565439. Purchase source. Concise, illustrative, clear style, many examples, exercises; see how stepwise refinement, data abstraction aid program design. [Amazon.com] http://www.amazon.com/exec/obidos/ASIN/0201565439