Cattell, J. M. (1886). The time taken up by cerebral operations: Parts 1 & 2. Mind, 11, 220-242. doi:10.1093/mind/os-XI.42.220. [FULLTEXT]
Cattell, J. M. (1886). The time taken up by cerebral operations: Parts 1 & 2. Mind, 11, 220-242. doi:10.1093/mind/os-XI.42.220. [FULLTEXT]