TY  - RPRT
TI  - Sauropod trackways, evolution, and behavior.
AU  - Julia J Day
AU  - Paul Upchurch
AU  - David B Norman
AU  - Andrew S Gale
AU  - H Philip Powell
PY  - 2002
DO  - 10.1126/science.1070167
UR  - https://pubmed.ncbi.nlm.nih.gov/12040187/
ID  - 12040187
ER  -