00440nam a2200121Ia 450000500170000000800410001708200120005810000170007024501530008726000310024030000090027165000380028020240821151958.0240821s9999||||xx |||||||||||||| ||und||  a307 RUG  aRugg, Harold 0aIntroduction to American civilization: a study of economic life in the United States, a textbook in geography and civics with historical backgrounds  aBostonbGinn and co.c1929  a610p  aSOCIAL SCIENCES-TEACHING/RESEARCH