1. Facing zero population growth : reactions and interpretations, past and present Author/Creator: Spengler, Joseph J. 1902-1991. (Joseph John) Publication/Creation: Durham, N.C. : Duke University Press, 1978 Resource Type: Book Access & Availability: Loading
2. French predecessors of Malthus : a study in eighteenth-century wage and population theory Author/Creator: Spengler, Joseph J. 1902-1991. (Joseph John) Publication/Creation: Durham, N.C. : Duke University Press, 1942 Resource Type: Book Access & Availability: Loading