1945-, Smith, V. Kerry (Vincent Kerry),; Future., Resources for the (1979). Scarcity and growth reconsidered. Published for Resources for the Future by the Johns Hopkins University Press. ISBN0801822327. OCLC4515539. Consultado el 1 de agosto de 2018.
1945-, Smith, V. Kerry (Vincent Kerry),; Future., Resources for the (1979). Scarcity and growth reconsidered. Published for Resources for the Future by the Johns Hopkins University Press. ISBN0801822327. OCLC4515539. Consultado el 1 de agosto de 2018.