@misc{indiciae77bad0c8c95c, title = {The occurrence and fission-track ages of late neogene and quaternary volcanic sediments, Siwalik group, Northern Pakistan}, author = {G.D. Johnson and P. Zeitler and C. W. Naeser and N.M. Johnson and D.M. Summers and C.D. Frost and N.D. Opdyke and R.A.K. Tahirkheli}, year = {1982}, doi = {10.1016/0031-0182(82)90058-x}, url = {https://pubs.usgs.gov/publication/70011875}, note = {Source identifier: 70011875} }