@book { author = {D Armstrong and K Narayan}, title = {Groundwater Processes and Modelling - Part 6}, pages = {22}, year = {1998}, doi = {10.1071/9780643105386}, publisher = {CSIRO Publishing}, isbn = {978-0-643-10607-9}, URL = {https://ebooks.publish.csiro.au/content/9780643105386/9780643105386} }