A
A. Williams & Co. (2)
Aa, Pieter van der (3)
Abbot, Henry L. (5)
Adams, J. Q. (1)
Adlum, John (1)
Adrichem, Christiaan van (1)
Aitken, Robert (2)
Allard, Carel (2)
Allard, Huych (2)
Almon, John (1)
American Association for the Advancement of Science (2)
American Geographical Society of New York (2)
American Oleograph Co. (1)
American Society of Civil Engineers (1)
Andrews, John (2)
Anonymous (18)
Anthony, Daniel (1)
Anville, Jean Baptiste Bourguignon d' (11)
Apian, Peter (2)
Appalacian Mountain Club (1)
Appleton, William (1)
Après de Mannevillette, Jean-Baptiste-Nicolas-Denis d' (3)
| Arbuckle Bros. (4)
Arctowski, Henryk (1)
Armstrong, Mostyn John (1)
Arrowsmith, Aaron (6)
Aspinwall & Lincoln (1)
Atkinson, Edward (1)
Atwood, L.L.P. (1)
Au de Jolliet, Pierre d' (1)
Automobile Club of America (1)
B
Bache, Hartman (1)
Bachelder, John B. (4)
Bachmann, John (7)
Back, Jean Conrad (1)
Bacon & Co. (1)
Bacon, G. W. (George Washington) (1)
Badger, S. C. (1)
Badger, William O. (1)
Bailey, H. H. (Howard Heston) (9)
Bailey, H. H. (Howard Heston) & J.C. Hazen (11)
Bailey, O. H. (Oakley Hoopes) (13)
Bailey, O. H. (Oakley Hoopes) & J.C. Hazen (29)
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