APA (7th ed.) Citation

Geldmacher, R. C. (1957). Subgrade support characteristics. Purdue University.

Chicago Style (17th ed.) Citation

Geldmacher, R. C. Subgrade Support Characteristics. Lafayette: Purdue University, 1957.

MLA (9th ed.) Citation

Geldmacher, R. C. Subgrade Support Characteristics. Purdue University, 1957.

Warning: These citations may not always be 100% accurate.