Author
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American Horse Show Association
1
American Horse Shows Association
3
American Humane Education Society
1
American Museum of Natural History
3
American Mutoscope and Biograph Company
8
American Occupational Therapy Association
1
American Quarter Horse Association
2
American Quarter Racing Association
1
American Remount Association
1
American Saddle-Horse Breeders Association
2
American Saddlebred Horse Association
1
American Thoroughbred Breeders Association
1
American Trotting Association
1
American Trotting Register Association
1
Amon Carter Museum of Western Art
2
Anderson, C. W. 1891-1971
4
Anderson, Clinton
2
Anderson, Edward L. 1842-1916
1
Anderson, Edward L. 1842-1916,
2
Anderson, Isabel, 1876-1948
1
Anderson, J. K.
2
Anderson, Peggy Perry
1
Anderson, Tom
1
Anderson, Tom,
1
Andersson, Petra,
1
Andrews, Frank M., DVM, MS
1
Andrist, Friedrich
1
Annual ABA GPSolo National Solo & Small Firm Conference
1
Ansell, Michael Picton,
1
Anthony, David W.
1
Anthony, David W.,
1
Appaloosa Horse Club
2
Apple, Margot,
1
Apps, Jerold W., 1934-
1
Apsley, Viola
1
Arab Horse Society
4
Arabian Horse Club Registry of America
1
Arabian Horse Club of America
2
Arabian Racing Association of Florida
1
Arbeitsgemeinschaft für Osteosynthesefragen
1
Arcaro, Eddie, 1916-1997
1
Ardery, Philip, 1914-
2
Ardus, Mathew O.
2
Argent, Gala, 1955-
1
Argyle, Harvey
1
Armitage, F. S.,
1
Armstrong, Cosmo,
1
Armstrong, Jennifer, 1961-
1
Arnold, Ann.,
1
Arts and Entertainment Network
2
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