77813869
Aug 27, 2009
Nov 9, 2010
Prerecorded audio tapes and compact discs featuring content in the fields of science, mathematics and technology
Electrical and Scientific ApparatusPamphlets, magazines, newsletters, journals, teachers' guide books and brochures in the fields of science, mathematics, and technology; stationery; activity cards for use in education and entertainment containing information and instructions in the areas of science, mathematics and technology
Paper Goods and Printed Matter