00379nam a2200133 a 4500041000800000082001900008100001500027245010900042250001100151260003500162300001000197650002500207650001300232  aeng  a338.95bA97t43  aAyres, C.E  aThe theory of economic progressba study of the fundamentals of economic development and cultural change  a2a. ed  aNew YorkbSchocken Booksc1962  a317 p  aDESARROLLO ECONOMICO  aECONOMIA