Results of physical tests of road building rock
Woolf, D.O.
Results of physical tests of road building rock - Washington 1930 - 1-148 p. - United States Department of Agriculture. Miscellaneous Publication No. 76 .
Results of physical tests of road building rock - Washington 1930 - 1-148 p. - United States Department of Agriculture. Miscellaneous Publication No. 76 .