Author
United States. Department of State
27
Mexico
25
Smithsonian Institution
12
Hobbs, Horton H. 1914-1994
3
Abbatiello, Michael J.
2
Baker, Edward W., 1914-2005
2
Barnard, J. Laurens 1928-1991
2
Tuttle, Donald M. 1917-
2
Chapman, Brian R.
1
Djibouti
1
Flentrop, D. A. 1910-2003
1
Flint, Oliver S.
1
Holt, Perry C.
1
International Atomic Energy Agency
1
National Museum of Natural History (U.S.)
1
Norris, James N.
1
Robinson, Harold, 1932-
1
Scullen, Herman A. 1887-
1
Tunnell, John W., Jr
1
United States. Bureau of Consular Affairs
1
United States. Embassy (Mexico)
1
Villalobos-Figueroa, Alejandro
1