Dividends from Space
New York: Thomas Y. Crowell Company, 1972. Reprint. Third printing. Hardcover. xi, 309 p. Illustrations. Bibliography. Index. More
New York: Thomas Y. Crowell Company, 1972. Reprint. Third printing. Hardcover. xi, 309 p. Illustrations. Bibliography. Index. More
New York: Harper & Row, 1985. 4th ed (but new title). First printing. Hardcover. xi, [i], 308 p. Illustrations (some in color). Bibliography. Index. More