Title: Natural sandstone rock asphalt. A report of an investigation conducted by the Engineering Experiment Station, Purdue University, in co-operation with the State Highway Commission of Indiana.
Authors: Tyler, Owen Russell.; Goetz, William Harner, 1914-; Slesser, Charles, 1915-; Purdue University.; Indiana.; Purdue University.
Publisher: Engineering Experiment Station, Purdue University,
Year: 1941
Subjects: Asphalt rock.; Sandstone.
Contents: Summer Vacation -- At the Ocean -- Time for Lunch! -- Swimming Is Fun! -- Playing in the Sand -- Time to Go -- Glossary.