Brytyjski kartograf.

The Oxford atlas / ed. by Clinton Lewis, J. D. Campbell ; with the assistance of D. P. Bickmore and K. F. Cook. - London, 1961.

BL online

Further examples of environmental maps / ed. by David Bickmore. - Madrid, 1984.

LCA online

Strona internetowa Geoforum, 11.07.2013 http://http://geoforum.pl/?menu=46814,47012,47013&link=gis-chronologia-w-dobie-komputerow