1. The Culture of Poplars in Eastern North America;Dickmann,1983
2. Poplars can be bred to order for minirotation fiber, timber, and veneer production for amenity plantings;Shreiner,1974
3. Applied Forest Tree Improvement;Zobel,1984
4. Use of controlled-environment and statistical techniques to maximize discrimination among clones;Zuuring,1983
5. An approach toward a rational classification of climate;Thornthwaite;Geographical Review,1948