01108cam a2200313 4500 547802472 TxAuBib 19990602120000.0 990602s1989||||||||||||||||||||||||eng|u 88033707 /AC 9780865923713 086592371X DLC DLC DLC TxAuBib Baker, David, 1944- Exploring Venus and Mercury / by David Baker. Vero Beach, FL : Rourke Enterprises, 1989. 47 p. : ill. (some col.) ; 27 cm. Today's world in space Includes index. Chronicles NASA's exploration of Venus and Mercury, describing the missions and scientific discoveries made by Mariner and Pioneer. 19990602. Planets Exploration Juvenile literature. Planets Exploration. Venus (Planet) Juvenile literature. Venus (Planet.) Mercury (Planet) Juvenile literature. Mercury (Planet.) Today's world in space.