https://kohalibrary.pids.gov.ph//cgi-bin/koha/opac-search.pl?q=ccl=su%3A%22Conservation%20of%20natural%20resources%22%20and%20location%3ARES%20and%20su-to%3ANatural%20resources.&format=rss2 4 0 100 ISBN 444876464 https://kohalibrary.pids.gov.ph//cgi-bin/koha/opac-detail.pl?biblionumber=3877 By Arrow, Kenneth J.. Amsterdam [etc.] : North-Holland, 2005 . 3 v. (xxiii, 1357 p.) : ill. ; 25 cm. 444876464

]]> https://kohalibrary.pids.gov.ph//cgi-bin/koha/opac-detail.pl?biblionumber=3877 ISBN 444876464 https://kohalibrary.pids.gov.ph//cgi-bin/koha/opac-detail.pl?biblionumber=3878 By Kneese, Allen V.. The Netherlands : North-Holland, 1996 . 3 v. (xxiii, 1357 p.) : ill. ; 25 cm. 444876464

]]> https://kohalibrary.pids.gov.ph//cgi-bin/koha/opac-detail.pl?biblionumber=3878 ISBN 444876464 https://kohalibrary.pids.gov.ph//cgi-bin/koha/opac-detail.pl?biblionumber=3879 By Arrow, Kenneth J.. The Netherlands : North-Holland, 1995 . 3 v. (xxiii, 1357 p.) : ill. ; 25 cm. 444876464

]]> https://kohalibrary.pids.gov.ph//cgi-bin/koha/opac-detail.pl?biblionumber=3879 ISBN 9780915825882 https://kohalibrary.pids.gov.ph//cgi-bin/koha/opac-detail.pl?biblionumber=4144 By Tunstall, Daniel B.. Washington, D.C. : World Resources Institute, 1992 . vi, 230 pages ; 28 cm 9780915825882

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