TY  - RPRT
TI  - APSAS; an Automated Particle Size Analysis System
AU  - Lawrence J. Poppe
AU  - A.H. Eliason
AU  - J.J. Fredericks
PY  - 1985
DO  - 10.3133/cir963
UR  - https://pubs.usgs.gov/publication/cir963
ID  - cir963
ER  -