73146955
Nov 2, 1977
Apr 28, 1981
Teaching Apparatus-Namely, Educational Kits Containing Scientific Apparatus and Materials for Use by Students in Performing Experiments in the Science Curriculum Improvement Study (SCIS) Program
Electrical and Scientific ApparatusTeacher Guides and Student Manuals for Use in the Science Curriculum Improvement Study (SCIS) Program
Paper Goods and Printed Matter