00376nam a2200145 a 4500041000800000082001800008100002600026245001900052260003500071300004200106440003300148650001400181650001500195700002000210 aspa a338.19bB878b aBrown, Lester Russell aBy Bread Alone aWashington, D.CbPraegerc1974 a272 pbil., diagrs., gráfs., tablas aPaperbacks : Economicnp-444 aALIMENTOS aPRODUCCION aEckholm, Erik P