na YOGYA-02090000030802 20090227024522.0 ind 010-020900000030802 508.3 508.3 Fre P Freedman, Paul The principles of scientific research Paul Freedman Cet. 1 London Macdonald Co 1949 ix, 222 hlm ilus 21 cm Indeks Dasar-dasar penelitian ilmiah YOPDYOG(B) 01-08-2006 1 b000049435