Наука и жизнь #03 1956
Nauka i Zhizn Magazine
Michael Cobley - Humanity's Fire book 1
Seeds of Earth
Крокодил, 1952 , № 12
Krokodil Magazine
De l'origine des espËces
Charles Darwin
The City of souls: The Fourth Sign of the Zodiac
Vicki Pettersson
Signs of the Zodiac (4)