http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-search.pl?q=ccl=au%3AWilliams%2C%20Colin%20Wilbur%2C%201921-&format=rss2 4 0 50 ISBN http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=4596 By Williams, Colin Wilbur, 1921-. New York : National Council of the Churches of Christ in the U.S.A., 1964 . xxi, 105 p. ; 19 cm..

]]> http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=4596 ISBN http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=15837 By Williams, Colin Wilbur, 1921-. New York : National Council of Churches, 1964 . xxi, 105 p. ; 19 cm..

]]> http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=15837 ISBN http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=14220 By Williams, Colin Wilbur, 1921-. New York : Harper & Row, 1966 . 128 p. ; 21 cm..

]]> http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=14220 ISBN 9977-958-01-0 http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=15145 By Williams, Colin Wilbur, 1921-. San José, C.R. : Sebila, 1989 . 161 p. ; 20 cm. 9977-958-01-0

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