Proportion between interorbital width and facial height. A new cranial index ; its significance in modern and fossil man: Craniometric studies No. 30v. 16No. 2Wiley-Blackwell237–242
Cameron, John. 1931. "Proportion between interorbital width and facial height. A new cranial index ; its significance in modern and fossil man: Craniometric studies No. 30." American Journal of Physical Anthropology, 16, (2) 237–242.