Stone G. H. George H. (1899). The Glacial gravels of Maine and their associated deposits. Washington, Governmext Printing Office, 1899.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিStone G. H. George H. The Glacial Gravels of Maine and Their Associated Deposits. Washington, Governmext Printing Office, 1899, 1899.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিStone G. H. George H. The Glacial Gravels of Maine and Their Associated Deposits. Washington, Governmext Printing Office, 1899, 1899.
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