Não informado. (1927). California highways and public works. State of California, Department of Public Works.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. California Highways and Public Works. Sacramento, Calif: State of California, Department of Public Works, 1927.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. California Highways and Public Works. State of California, Department of Public Works, 1927.
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