TY  - RPRT
TI  - Geologic information for aggregate resource planning
AU  - William H. Langer
AU  - David A. Lindsey
AU  - Daniel H. Knepper
PY  - 2002
DO  - 10.1007/978-94-010-0303-2_7
UR  - https://pubs.usgs.gov/publication/70217738
ID  - 70217738
ER  -