Contributor USGS
This is a three-part article about the Birdseye Expedition that the USGS undertook to map the Grand Canyon in 1923. An embedded link in Part 1 provides access to silent black-and-white film footage that gives a visual Reader of the experience. Onscreen text is used in the film. A map and several black-and-white photographs with captions are also part of the article text.
This is a three-part article about the Birdseye Expedition that the USGS undertook to map the Grand Canyon in 1923. An embedded link in Part 1 provides access to silent black-and-white film footage that gives a visual Reader of the experience. Onscreen text is used in the film. A map and several black-and-white photographs with captions are also part of the article text.
Contributor USGS
READER MODULE
Seventh grade, Eighth grade, Ninth grade, Tenth grade, Eleventh grade, Twelfth grade
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