TY  - BOOK
AU  - Lockard,J.David
AU  - Pritzker,Charlene
AU  - Snyder,Susan
ED  - International Clearinghouse on Science and Mathematics Curricular Development
TI  - Twenty years of science and mathematics curriculum development: the tenth report of the International Clearinghouse  
PY  - 1977///]
CY  - College Part, Md.
PB  - The International Clearinghouse, Science Teaching Center, University of Maryland
KW  - Science
KW  - Study and teaching
KW  - Mathematics
ER  -