Landsberg, H. H., Fischman, L. L., & Fisher, J. L. (1963). Resources in America's future: Patterns of requirements and availabilities 1960-2000. Baltimore: John Hopkins Press.
Παραπομπή Chicago StyleLandsberg, Hans H., Leonard L. Fischman, and Joseph L. Fisher. Resources in America's Future: Patterns of Requirements and Availabilities 1960-2000. Baltimore: John Hopkins Press, 1963.
Παραπομπή MLALandsberg, Hans H., Leonard L. Fischman, and Joseph L. Fisher. Resources in America's Future: Patterns of Requirements and Availabilities 1960-2000. Baltimore: John Hopkins Press, 1963.
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