https://biblioteca.iapg.org.ar/cgi-bin/koha/opac-search.pl?idx=&q=an%3A4912&sort_by=relevance&format=rss 2 0 20 ISBN: https://biblioteca.iapg.org.ar/cgi-bin/koha/opac-detail.pl?biblionumber=130314 By Whalen, Bruce | Kirkley, Charles | University of Texas. Petroleum Extension Service.
Dallas, Texas University of Texas 1981 .
40 p.

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]]> https://biblioteca.iapg.org.ar/cgi-bin/koha/opac-detail.pl?biblionumber=130314 ISBN: https://biblioteca.iapg.org.ar/cgi-bin/koha/opac-detail.pl?biblionumber=130780 By McCann - Baker, Annes | Whalen, Bruce | University of Texas. Petroleum Extension Service.
Texas University of Texas 1988 .
46 p.

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]]> https://biblioteca.iapg.org.ar/cgi-bin/koha/opac-detail.pl?biblionumber=130780