Não informado. (1949). Abstracts of recent published material on soil and water conservation. Agricultural Research Service, Soil and Water Conservation Division.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Abstracts of Recent Published Material on Soil and Water Conservation. Washington: Agricultural Research Service, Soil and Water Conservation Division, 1949.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Abstracts of Recent Published Material on Soil and Water Conservation. Agricultural Research Service, Soil and Water Conservation Division, 1949.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.