Dyfyniad APA

(1950). Economical span length ratios for three-span continuous girder bridges by Donald H. Timmer. [electronic resource].

Dyfyniad Arddull Chicago

Economical Span Length Ratios for Three-span Continuous Girder Bridges by Donald H. Timmer. [electronic Resource]. 1950.

Dyfyniad MLA

Economical Span Length Ratios for Three-span Continuous Girder Bridges by Donald H. Timmer. [electronic Resource]. 1950.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.