《National Geographic Magazine Vol. 08 - 04. April 1897》 - 免费有声读物

The National Geographic Magazine, an illustrated monthly, the April Number.

It includes the following articles:

• A Summer Voyage to the Arctic, by G. R. Putnam
• The Area and Drainage Basin of Lake Superior, by Mark W. Harrington
• The Siberian Transcontinental Railroad, by Gen. A. W. Greely
• Geographic Literature and Serials