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  1. Apgar's plant analysis; adapted to Gray's botanies.
    By: Apgar, E. A. (Ellis A.), - Apgar, A. C. (Austin Craig),
    Publication info: and Chicago,Ivison, Blakeman, Taylor & co.[1874]
    Holding Institution: Cornell University Library
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  2. Birds of the United States east of the Rocky Mountains; a manual for the identification of species in hand or in the bush,
    By: Apgar, A. C. (Austin Craig),
    Publication info: Cincinnati [etc.]American Book Co.[c1898]
    Holding Institution: Cornell University Library
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  3. Birds of the United States east of the Rocky Mountains; a manual for the identification of species in hand or in the bush,
    By: Apgar, A. C. (Austin Craig),
    Publication info: New York,American book company[c1898]
    Holding Institution: American Museum of Natural History Library
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  4. A key to the Mollusca : given in Verrill's systematic catalogue, of the invertebrates of southern New England, and the adjacent waters
    By: Apgar, A. C. (Austin Craig), - Verrill, A. E. (Addison Emery), - Hektograph Company,
    Publication info: Trenton, N.J. :Hektograph Print.,1880.
    Holding Institution: Smithsonian Libraries
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  5. Mollusks of the Atlantic coast of the United States : south to Cape Hatteras /
    By: Apgar, A. C. (Austin Craig),
    Publication info: Trenton, N.J. :Lucas & co.,[1891]
    Holding Institution: Multiple institutions
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  6. Ornamental shrubs of the United States (hardy, cultivated)
    By: Apgar, A. C. (Austin Craig), - Draycott, Ada (Apgar)
    Publication info: Cincinnati [etc]American Book Company[c1910]
    Holding Institution: Cornell University Library
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  7. Ornamental shrubs of the United States (hardy, cultivated)
    By: Apgar, A. C. (Austin Craig), - Draycott, Ada Apgar.
    Publication info: New York,American Book Company[c1910]
    Holding Institution: NCSU Libraries (archive.org)
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  8. Pocket key of the birds of the northern United States, east of the Rocky Mountains /
    By: Apgar, A. C. (Austin Craig),
    Publication info: Trenton, N.J. :J.L. Murphy Pub. Co., Printers,1893.
    Holding Institution: Library of Congress
    BHL Collections: Library of Congress
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  9. Trees of the northern United States : their study, description and determination, for the use of schools and private students,
    By: Apgar, A. C. (Austin Craig),
    Publication info: Cincinnati [etc.]American book company [1892]
    Holding Institution: Cornell University Library
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  10. Trees of the northern United States: their study, description and determination, for the use of schools and private students.
    By: Apgar, A. C. (Austin Craig),
    Publication info: New York, Cincinnati :American book company,[1892]
    Holding Institution: University of California Libraries (archive.org)
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