Duff, J. E., Koenigshof, G. A., & Wittenberg, D. C. (1978). Performance standards for COM-PLY floor joists. Dept. of Agriculture, Forest Service, Southeastern Forest Experiment Station.
Chicago Style (17th ed.) CitationDuff, John E., Gerald A. Koenigshof, and Dick C. Wittenberg. Performance Standards for COM-PLY Floor Joists. [Asheville, N.C.]: Dept. of Agriculture, Forest Service, Southeastern Forest Experiment Station, 1978.
MLA (9th ed.) CitationDuff, John E., et al. Performance Standards for COM-PLY Floor Joists. Dept. of Agriculture, Forest Service, Southeastern Forest Experiment Station, 1978.
Warning: These citations may not always be 100% accurate.