TY  - BOOK
T1  - A technique for developing content for a professional course in science for teachers in elementary schools
A1  - Billig, Florence Grace, 1888-
A1  - Originally presented as the author's thesis, Columbia
LA  - English
PP  - New York
PB  - AMS Press
YR  - 1930
UL  - https://ds.mainlib.upd.edu.ph/Record/UP-99796217607675089
OP  - 101
NO  - Bibliography: p. 99-101.
NO  - Reprint of the 1930 ed., issued in series: Teachers College, Columbia University. Contributions to education, no. 397.
CN  - Q181 B55 1930
SN  - 0404553974
KW  - Elementary school teachers -- In service training.
KW  - Science teachers -- Teachers training.
ER  -