TY  - RPRT
TI  - The travel-time ellipse: An approximate zone of transport
AU  - J.E. Almendinger
PY  - 1994
DO  - 10.1016/0022-1694(94)90135-x
UR  - https://pubs.usgs.gov/publication/70017653
ID  - 70017653
ER  -