Měsíc neznámý. První fotografie odvrácené strany Měsíce. [The Unknown Moon: The First Photographs of the Far Side of the Moon]. Prague: Nakladatelství Československé akademie věd, 1959. 19x21 cm. 40 pp. Loose gatherings in paper cover. Original slipcase (with wear and tear at border). No. 151 of 500 published by the Czechoslovak Academy of Science as a New Year's greeting. Cover and design by Jiří Ledr. VG condition. TB5.