Παραπομπή APA

(1961). Standard specifications for construction of roads and bridges on federal highway projects. Washington, D.C: Government Printing Office.

Παραπομπή Chicago Style

Standard Specifications for Construction of Roads and Bridges On Federal Highway Projects. Washington, D.C: Government Printing Office, 1961.

Παραπομπή MLA

Standard Specifications for Construction of Roads and Bridges On Federal Highway Projects. Washington, D.C: Government Printing Office, 1961.

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