Individual Differences in Arithmetical Abilities: Implications for Psychology, Neuroscience and Education By Ann Dowker 2005 | 368 Pages | ISBN: 1841692352 | PDF | 3 MB
Evolution: Cosmic, Biological, and Social by Leonid E. Grinin, Robert L. Carneiro, Аndrey V. Korotayev, Fred Spier English | 2011 | ISBN: 5705727844, 9785705727841 | 294 pages | PDF | 4,4 MB