His Dualistic economic ... 1972.

His Population and development in rural Egypt, 1982: CIP t.p. (Allen C. Kelley) data sheet (b. 9-5-37)

His Is there a negative correlation between population ... 1994: CIP t.p. (Allen C. Kelley) galley (prof., economics, and assoc. dir., Ctr. for Demographic Studies, Duke Univ.)