@misc{indiciae893eec8dc0c9, title = {Fresh and saline ground-water zones in the Punjab region, West Pakistan}, author = {W.V. Swarzenski}, year = {1968}, doi = {10.3133/wsp1608i}, url = {https://pubs.usgs.gov/publication/wsp1608I}, note = {Source identifier: wsp1608I} }