00274nam a2200097Ia 4500008004100000082001500041100002000056245005300076260003600129300001100165190709s9999    xx            000 0 und d  a375.3 B16T  aBining, David.H 0aTeaching the social studies in secondary schools  a3rdbMcgraw-Hill Book Co.c1952  aix+350