https://biblioteca.uaysen.cl/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Gelles%2C%20Paul%20H.%2C%22&format=rss2 2 0 50 ISBN https://biblioteca.uaysen.cl/cgi-bin/koha/opac-detail.pl?biblionumber=251962 By Gelles, Paul H.,. Lima, Peru Pontificia Universidad Católica del Perú, Fondo Editorial 2002 . 1 online resource (239 pages) :

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