On the track of discovery : riddles of outer space. scientists unravel mysteries. secrets of history. /
translated by D. Skvirsky and V. Talmi.
- Moscow : Progress publishers, 1964.
- 190 p. : ill. ; 21 cm.
- Series ; 2. .
313 313
Travel.
Geography.
910 / P943o
313 313
Travel.
Geography.
910 / P943o