1. Methods of soil analysis, Part I;Black,1965
2. Prediction of oak site index in the ridge and valley region of Pennsylvania;Bowersox;For Sci.,1972
3. Analysis of forest survey atmospheric deposition data in Pennsylvania;Brooks,1990
4. Black oak site quality in relation to soil and topography in southeastern Ohio;Carmean,1965
5. Site index curves for upland oaks in the central states;Carmean;For. Sci.,1972