Creative visions for the future: A new conservation education strategy in Iowa--bridging agriculture and science with the earthworm through the living soil
Weber, E. (author) and SOIL AND WATER CONSERVATION SOCIETY, 7515 NORTHEAST ANKENY RD, ANKENY, IA 50021-9764 (USA). p. 11, 11. SOIL AND WATER CONSERVATION SOCIETY, 7515 NORTHEAST ANKENY RD, ANKENY, IA 50021-9764 (USA),