TY  - BOOK
AU  - Prévost Hubbard
AU  - Frank Herbert Jackson
TI  - Relation Between the Properties of Hardness and Toughness of Road-Building Rock
PY  - 1916///
CY  - USA
KW  - English
KW  - General
N1  - Reprint from Journal of Agricultural Research Department of Agriculture .Volume V, No.19
ER  -