Hope, Laura Lee. The Bobbsey twins' adventure in Washington. [electronic resource] - New York, Grosset & Dunlap [1963] - vii, 174 p. illus. 20 cm. - Her The Bobbsey twins books, 12 . "8012." ISBN: 0448080125 $2.50 9780448080123 LCCN: 63006277 Subjects--Topical Terms: Bobbsey Twins (Fictitious characters)--Juvenile fiction.Twins--Juvenile fiction.Detective and mystery stories--Juvenile fiction. LC Class. No.: PZ7.H772