1. Research history and opportunities in the Luquillo Experimental Forest. General Technical Report No. SO-44;Brown,1983
2. Particulate soil organic-matter changes across a grassland cultivation sequence;Cambardella;Soil Science Society of America Journal,1992
3. Carbon and nitrogen distribution in aggregates from cultivated and native grassland soils;Cambardella;Soil Science Society of America Journal.,1993
4. Carter, M.R.,1993. Soil sampling and methods of analysis. Lewis Publishers, Toronto, Canada.
5. 3H thymidine incorporation technique to determine soil bacterial growth rate;Christensen,1995