TY - BOOK AU - Kahl,David H. AU - Gast,Barbara J. ED - International Center for Educational Development. TI - Learning centers in the open classroom AV - LB 1029 .K12 1974 U1 - TR 372.16 PY - 1974///] CY - Encino, Calif. PB - International Center for Educational Development KW - Open plan schools KW - Classroom learning centers N1 - Faculty ER -