http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-search.pl?q=ccl=Provider%3ABoard%20of%20Christian%20Education%20of%20the%20United%20Presbyterian%20Church%20in%20the%20U.S.A%2C%2C&format=rss2 2 0 50 ISBN http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=14226 By Hessel, Deter. Philadelphia, Pa. : Board of Christian Education of the United Presbyterian Church in the U.S.A,, 1970 . 39 p. : 22 cm..

]]> http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=14226 ISBN http://biblioteca.ubl.ac.cr/cgi-bin/koha/opac-detail.pl?biblionumber=18832 By Rycroft, W. Stanley (William Stanley). United States : Board of Christian Education of the United Presbyterian Church in the U.S.A,, 1968 . 332 p. . il. pleg. ; 23 cm.

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