73076306
Feb 5, 1976
Feb 22, 1977
TEACHING AIDS FOR THE METRIC SYSTEM-NAMELY, FILM STRIPS, METRIC RULERS AND METRIC TAPE MEASURES
Electrical and Scientific ApparatusTEACHING AIDS FOR THE METRIC SYSTEM-NAMELY, CUBIC DECIMETRE BOXES, CLASSROOM WALL POSTERS, GRADUATED CYLINDERS AND TEACHERS' MANUALS
Paper Goods and Printed Matter