Copyright (C) 1969 Johan M. Snoek.
Produced by the nephew of the author.
Transcriber's Note: (Gutenberg preparation by Ge J. Snoek 2004: g.snoek3@chello.nl The original printed paper book pages are marked as <xxx> right aligned, (because lots of pages are referenced: omitting page nrs troubles comfortable searching, while footnotes are marked/numbered between square [123] hooks.)