TY  - RPRT
TI  - Reply to comment by E.K. Jessberger
AU  - M. A. Lanphere
AU  - G. Brent Dalrymple
PY  - 1977
DO  - 10.1016/0012-821x(77)90160-1
UR  - https://pubs.usgs.gov/publication/70010398
ID  - 70010398
ER  -