Books by Ida Augusta Keller:
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Keller, Ida Augusta: Handbook of the Flora of Philadelphia and Vicinity (Philadelphia: Philadelphia Botanical Club, 1905), also by Stewardson Brown (page images at HathiTrust)
Additional books by Ida Augusta Keller in the extended shelves:
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Keller, Ida Augusta: Handbook of the flora of Philadelphia and vicinity, containing data ... (Philadelphia, Philadelphia botanical club, 1905) (page images at HathiTrust; US access only)- Keller, Ida Augusta: Insects of Philadelphia and vicinity, with especial reference to the more common and conspicuous forms and also to those of economic importance. ([n.p.], 1910) (page images at HathiTrust; US access only)
Find more by Ida Augusta Keller at your library, or elsewhere.