TY  - RPRT
TI  - PEBBLE PICKING VERSUS BOULDER BUILDING.
AU  - J R ROYCE
PY  - 1965
DO  - 10.2466/pr0.1965.16.2.447
UR  - https://pubmed.ncbi.nlm.nih.gov/14285846/
ID  - 14285846
ER  -