Popenoe, Judson Hop Culture

Popenoe, Paul Bowman Date Growing in the old World and the New

Popenoe, Paul Applied Eugenics, By Paul Popenoe ...and Roswell Hill Johnson

Popenoe, Hugh L Effects of Shifting Cultivation on Natural Soil Constituents in Central America

Popenoe, Paul Bowman 1888-1979 Babylonian Dates for California

Popenoe, Judson Hop Culture