@software{shawn_graham_2017_814190, author = {Shawn Graham}, title = {{shawngraham/dhworkbook: hist3814o summer 2017 version}}, month = jun, year = 2017, publisher = {Zenodo}, version = {2.0}, doi = {10.5281/zenodo.814190}, url = {https://doi.org/10.5281/zenodo.814190} }