How time is measured /
Hood, Peter, 1905-
How time is measured / Peter Hood, - 2nd ed. - London : Oxford U.P., 1969. - 62 p. illus. (some col). 29 cm.
Bibliography: p. 62.
0198366159
Time.
QB209 / .H62 1969
529 / HOO 1969
How time is measured / Peter Hood, - 2nd ed. - London : Oxford U.P., 1969. - 62 p. illus. (some col). 29 cm.
Bibliography: p. 62.
0198366159
Time.
QB209 / .H62 1969
529 / HOO 1969