Não informado. Association of Engineering Geologists newsletter. Association of Engineering Geologists.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Association of Engineering Geologists Newsletter. Lawrence, Kan: Association of Engineering Geologists.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Association of Engineering Geologists Newsletter. Association of Engineering Geologists.
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