Ridgway, R. L., comp. Agricultural Production and Natural Resource Conservation: Preliminary Assessments of Selected Projects. Silver Spring, MD: Charles Valentine Riley Memorial Foundation, 1997. [Assessment of selected cooperative projects for exploring opportunities to strengthen linkages between economically viable agricultural-production and natural-resource conservation activities.], 1997

Ridgway, R. L., comp. Agricultural Production and Natural Resource Conservation: Preliminary Assessments of Selected Projects. Silver Spring, MD: Charles Valentine Riley Memorial Foundation, 1997. [Assessment of selected cooperative projects for exploring opportunities to strengthen linkages between economically viable agricultural-production and natural-resource conservation activities.], 1997, Box: 1. Charles Valentine Riley Memorial Foundation Records, MS0281. National Agricultural Library Special Collections. http://localhost:8081/repositories/4/archival_objects/55892 Accessed November 28, 2025.