Thurston, H. David, and Neil R. Miller. (1990) 1990. “Traditional Agriculture and Plant Pathology (TAPP) Database [ASCII Format for the Macintosh]”. Ithaca, NY: Cornell University Department of Plant Pathology.
multistorey cropping
Thurston, H. David. (1989) 1989. “Household Gardens, Crop Architecture, and Traditional Disease Management”. Cornell University, Ithaca, NY.