@book { , title = {Storage of the grid-square based 1971 Great Britain census data : checking procedures}, journal = {Working papers (University of Durham, Department of Geography, Census Research Unit); no.7}, publicationstatus = {Published}, url = {https://hull-repository.worktribe.com/output/378370}, keyword = {Census data}, author = {Perry, B J and Visvalingam, Maheswari} }