1. The quandary of utilization and preference;Cook;J. Range Mgt,1953
2. Range conservation as based on sites and condition class;Dyksterhuis;J. Soil Wat. Conserv.,1958
3. The forage ratio and its use in determining the food grade of streams;Hess,1940
4. Experimental ecology of feeding of fishes;Ivlev,1961
5. Basic problems and techniques in range research;National Academy of Sciences;Natn. Acad. Sci., Nat. Res. Coun. Publ. 890,1962