(1950). Economical span length ratios for three-span continuous girder bridges / by Donald H. Timmer.
Chicago-viite (17. p.)Economical Span Length Ratios for Three-span Continuous Girder Bridges / by Donald H. Timmer. 1950.
MLA-viite (9. p.)Economical Span Length Ratios for Three-span Continuous Girder Bridges / by Donald H. Timmer. 1950.
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