73154422
Jan 6, 1978
Jun 29, 1982
Teacher Demonstration Devices and Teacher and Student Instruments for Teaching Weights and Measures, Mathematics and Science-Namely, Transparencies, Balances, Rules, Balance Weights, Volumetric Measures, Linear Measures and Theodolites
Electrical and Scientific ApparatusPrinted Educational Materials Sold as a Kit Dealing with the Subjects of Weights and Measures, Mathematics and Science-Namely, Cards, Templates, Overlays, Sheets, Charts, Game Rules, Posters, Course Outlines and Lesson Plans; Course Notes, Illustrations, Workbooks, and Course Books for Teachers and Students
Paper Goods and Printed Matter