Organic farming : the ecological system - Francis, Charles,; Baltensperger, David,; Dick, Warren,; Roberts, Craig,; Logsdon, Sally,; Savin, Mary,; Krishnan, Hari,; Ulery, April,; Al-Amoodi, Lisa, (American Society of Agronomy ; Crop Science Society of America ; Soil Science Society of America, 2009)
Agronomy Monograph 54