//-->
California and the nation 1850 - 1869 : a study of the relations of a frontier community with the federal government
Ellison, Joseph Roy, (1927)
Seventy-five years in California : a history of events and life in California: personal, political and military; under the Mexica regime; during the quasi-military government of the territory by the United States, and after the admission of the State of the Union ...
Davis, William Heath, (1929)
Aztatlán : prehistoric Mexican frontier on the Pacific coast
Sauer, Carl Ortwin, (1932)
In Franco's Spain : being the experiences of an Irish war-correspondent during the great civil war which began in 1936
McCullagh, Francis, (1937)