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Guano mining in the Central Chinchua (Chincha) Islands, ca. 1860.

Photo of fig 3.1 on page 30 of Glantz, "Currents of Change", which shows Neg. No. 311830 from the American Museum of Natural History. Copyright to image presumed expired; guessing a plausible license.

	這一媒體文件在美國屬於公有領域。這可用於版權過期的美國作品，通常這些作品發表於1929年1月1日之前。查看這個頁面可以獲取到更多的解釋。
	這一圖片在美國以外可以沒有處於公有領域，特別是對美國作品不適用較短期限法則的國家，如加拿大、中國大陸（不含香港及澳門）、德國、墨西哥和瑞士。作品的作者和發表時間是關鍵信息，並且必須提供。參見 維基百科:公有領域及維基百科:版權信息以獲取更多細節。

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• (del) (cur) 13:59, 22 January 2006 . . en:User:William_M._Connolley William M. Connolley ( en:User_talk:William_M._Connolley Talk) . . 558x730 (113065 bytes) ( en:Guano Guano mining in the Central Chinchua Islands, ca. 1860. Photo of fig 3.1 on page 30 of Glantz, "Currents of Change", which shows Neg. No. 311830 from the American Museum of Natural History. Copyright to image presumed expired; guessing a plausible li)