TY  - RPRT
TI  - The visual accumulation tube for sedimentation analysis of sands
AU  - B.C. Colby
AU  - R.P. Christensen
PY  - 1955
DO  - 10.3133/ofr5529
UR  - https://pubs.usgs.gov/publication/ofr5529
ID  - ofr5529
ER  -