https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Illingworth%2C%20Ronald%20Stanley%2C%22&sort_by=title_az&format=rss 3 0 50 ISBN:044309107X https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=41188 By Illingworth, Ronald Stanley,.
México : El Manual Moderno, 1982 .
473 p. 044309107X

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]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=41188 ISBN:9684263279 https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=41189 ]]> By Illingworth, Ronald Stanley,.
México : El Manual Moderno, 1985 .
490 p. 9684263279

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México : El Manual Moderno, 1993 .
473 p. : 9684266030

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