APA (7th ed.) Citation

American Wood-Preservers' Association, United States. Forest Service. Forest Products Laboratory, Madison, Humphrey, C. J., & Richards, C. A. (1939). Railroad tie decay: Comprising The decay of ties in storage, by C. J. Humphrey ... Defects in cross ties, caused by Fungi, by C. Audrey Richards. American Wood-Preservers' Association.

Chicago Style (17th ed.) Citation

American Wood-Preservers' Association, Madison United States. Forest Service. Forest Products Laboratory, C. J. Humphrey, and Clarice Audrey Richards. Railroad Tie Decay: Comprising The Decay of Ties in Storage, by C. J. Humphrey ... Defects in Cross Ties, Caused by Fungi, by C. Audrey Richards. Washington, D. C.: American Wood-Preservers' Association, 1939.

MLA (9th ed.) Citation

American Wood-Preservers' Association, et al. Railroad Tie Decay: Comprising The Decay of Ties in Storage, by C. J. Humphrey ... Defects in Cross Ties, Caused by Fungi, by C. Audrey Richards. American Wood-Preservers' Association, 1939.