United States. Department of Agriculture. Office of the Secretary & Hubbard, P. (1916). Results of physical tests of road-building rock. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary and Prévost Hubbard. Results of Physical Tests of Road-building Rock. Washington: [publisher not identified], 1916.
MLA (9th ed.) CitationUnited States. Department of Agriculture. Office of the Secretary and Prévost Hubbard. Results of Physical Tests of Road-building Rock. [publisher not identified], 1916.
Warning: These citations may not always be 100% accurate.