00540nam a22001817a 4500 BD-DhUL 20160612144658.0 160612s1941 xxu |||| |||| 001 0 eng d BD-DhUL BD-DhUL 371.42 BIG Billings, Mildred Lincoln. Group methods of studying occupations / Mildred Lincoln Billings. Pennsylvania : International Textbook, 1941. xi, 513 p. ; 23 cm. includes index. Educational counseling. ddc BK 78028 78028 0 0 ddc 0 371_420000000000000_BIG 0 NFIC 131809 DUL DUL GEN 1961-06-04 Gift 371.42 BIG A15825 2016-06-12 1 2016-06-12 BK