Fateful Lightning
William R. Forstchen
Lost Regiment (4)
Winter of the Ice Wizard: A Merlin Mission
Mary Pope Osborne
Magic Tree House (32)
Наука и жизнь #10 1953
Nauka i Zhizn Magazine
Наука и жизнь #09 1948
The Alpha Centauri Project (Thinking worlds)
Marco Santini