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Ridgway, Robert, 1850-1929
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1

The ornithology of Illinois: Descriptive catalogue:

Ridgway, Robert, 1850-1929
http://hdl.handle.net/2027/uiug.30112010311139.  , 1913
Link: http://hdl.handle.net/20..
 
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2

Color standards and color nomenclature:

Ridgway, Robert, 1850-1929
http://hdl.handle.net/2027/mdp.39015031112439.  , 1912
Link: http://hdl.handle.net/20..
 
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3

Color standards and color nomenclature:

Ridgway, Robert, 1850-1929
https://www.biodiversitylibrary.org/bibliography/144788.  , 1912
Link: https://www.biodiversity..
 
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4

A manual of North American birds:

Ridgway, Robert, 1850-1929
https://www.biodiversitylibrary.org/bibliography/11833.  , 1910
Link: https://www.biodiversity..
 
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5

Birds of the world; a popular account:

Knowlton, Frank Hall, 1860-1926 ; Ridgway, Robert, 1850-1929 ; Lucas, Frederic A. (Frederic Augustus), 1852-1929
https://www.biodiversitylibrary.org/bibliography/33001.  , 1909
Link: https://www.biodiversity..
 
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6

A history of North American birds:

Baird, Spencer Fullerton, 1823-1887 ; Brewer, T. M. (Thomas Mayo), 1814-1880 ; Ridgway, Robert, 1850-1929.
https://www.biodiversitylibrary.org/bibliography/12713.  , 1905
Link: https://www.biodiversity..
 
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7

A history of North American birds:

Baird, Spencer Fullerton, 1823-1887 ; Ridgway, Robert, 1850-1929 ; Brewer, Thomas Mayo, 1814-1880
http://hdl.handle.net/2027/mdp.39015019725343.  , 1905
Link: http://hdl.handle.net/20..
 
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8

The birds of North and middle America: a descriptive catalo..:

Ridgway, Robert, 1850-1929 ; Friedmann, Herbert, 1900-1987
https://www.biodiversitylibrary.org/bibliography/48566.  , 1901
Link: https://www.biodiversity..
 
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9

The birds of North and Middle America : a descriptive catal..:

Ridgway, Robert, 1850-1929 ; Friedmann, Herbert, 1900-1987
https://www.biodiversitylibrary.org/bibliography/54021.  , 1901
Link: https://www.biodiversity..
 
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10

The birds of North and Middle America : a descriptive catal..:

Ridgway, Robert, 1850-1929 ; Friedmann, Herbert, 1900-1987
http://hdl.handle.net/2027/uiug.30112032535301.  , 1901
Link: http://hdl.handle.net/20..
 
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11

The birds of North and Middle America: a descriptive catalo..:

Ridgway, Robert, 1850-1929 ; Friedmann, Herbert, 1900-1987 ; United States National Museum
http://hdl.handle.net/2027/uc1.31822008827479.  , 1901
Link: http://hdl.handle.net/20..
 
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12

The birds of North and Middle America: a descriptive catalo..:

Ridgway, Robert, 1850-1929
https://www.biodiversitylibrary.org/bibliography/159251.  , 1901
Link: https://www.biodiversity..
 
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13

A manual of North American birds:

Ridgway, Robert, 1850-1929
http://hdl.handle.net/2027/uc1.c026323140.  , 1900
Link: http://hdl.handle.net/20..
 
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14

A manual of North American birds:

Ridgway, Robert, 1850-1929
https://www.biodiversitylibrary.org/bibliography/48811.  , 1900
Link: https://www.biodiversity..
 
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15

William Brewster correspondence. Desiderata of J. L. Ridgwa..:

Ridgway, John L., 1859-1947 ; Brewster, William, 1851-1919 ; Ridgway, Robert, 1850-1929
https://www.biodiversitylibrary.org/bibliography/192875.  , 1899
Link: https://www.biodiversity..
 
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