KROPOTKIN, P.
Mutual aid: a factor of evolution / [by] P.Kropotkin - Harmondsworth Penguin Books Ltd. 1939 - 278 p.
334.7 / KRO
Mutual aid: a factor of evolution / [by] P.Kropotkin - Harmondsworth Penguin Books Ltd. 1939 - 278 p.
334.7 / KRO