9401
Publicado 1880
“...E.U.A Bureau of Foreign Commerce (1854-1903)...”
9402
9403
9404
por Marín Martínez, Tomás
Publicado 2002
“...Universidad Nacional de Educación a Distancia (Madrid, España)...”Publicado 2002
9405
Publicado 1990
“...California (E.U.A.) Departament of Education Bureau of Publications...”
9406
Publicado 1990
“...California (E.U.A.) . Departament of Education . Bureau of Publications...”
9407
Publicado 1933
“...Philadelphia Free library Edwin A. Fleisher music collection...”
9408
Publicado 1916
“...Segund[a] Congreso Científico Panamericano...”
9409
9410
Publicado 1966
“...Aseguradora Nacional Agrícola y Ganadera, S.A. (México)...”
9411
Publicado 1965
“...E.U.A Forest Products Laboratory (Madison, Wis.)...”
9412
por Oberg, Kalervo, 1901-
Publicado 1949
“...E.U.A . Interdepartmental Committee on Scientific and Cultural Cooperation...”Publicado 1949
9413
Publicado 1935
“...Compañía Mexicana de Petróleo "El Aguila," S.A...”
9414
Publicado 1954
“...Colegio de Ingenieros Agrónomos de México, A.C...”
9415
Publicado 1957
“...E.U.A National Committee on Radiation Protection and Measurements...”
9416
Publicado 1960
“...E.U.A National Committee on Radiation Protection and Measurements...”
9417
Publicado 1960
“...E.U.A National Committee on Radiation Protection and Measurements...”
9418
Publicado 1961
“...E.U.A National Committee on Radiation Protection and Measurements...”
9419
Publicado 1901
“...E.U.A Congress Senate Committee on Foreign Relations...”
9420
Publicado 1964
“...E.U.A National Committee on Radiation Protection and Measurements...”