Books by Douglas Clay Ridgley:
Books in the extended shelves:
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Ridgley, Douglas Clay, 1868-: General circulation of the atmosphere (McKnight & McKnight, 1910) (page images at HathiTrust)- Ridgley, Douglas Clay, 1868-: Home geography; a textbook for pupils, based on the Illinois state course of study (McKnight & McKnight, 1915), also by Lura Mary Eyestone (page images at HathiTrust)
- Ridgley, Douglas Clay, 1868-: Journeys around the world (McKnight & McKnight, 1937) (page images at HathiTrust; US access only)
- Ridgley, Douglas Clay, 1868-: Rainfall of the earth (McKnight & McKnight, 1910) (page images at HathiTrust)
- Ridgley, Douglas Clay, 1868-: Studies in the geography of Ohio and North America; a reference workbook for grade pupils to accompany any textbook in geography (McKnight & McKnight, 1930), also by Eugene Van Cleef, E. Clarence Koeppe, and B. Marion Forsythe (page images at HathiTrust; US access only)
- Ridgley, Douglas Clay, 1868-: Vegetation zones of the earth (McKnight & McKnight, 1910) (page images at HathiTrust)
Find more by Douglas Clay Ridgley at your library, or elsewhere.