1911 – 2009
Bibliografía (7 obras)
The Ancient Aztecs
2008
Cuba, Cubans and Cuban-Americans, 1902-1991
1992
Doctoral research on Canada and Canadians =
1986
Doctoral research at the School of Education, New York University, 1890-1970
1972
Doctoral research on Puerto Rico and Puerto Ricans
1967
Doctoral research on Russia and the Soviet Union
1960
Education among the ancient Aztecs
1941
