Hood, Peter.
How time is measured / Peter Hood. - London : Oxford University Press, 1955. - 64 p. : ill. ; 24 cm. - Oxford visual series. .
300 300
Time.
529.7 / H761h
How time is measured / Peter Hood. - London : Oxford University Press, 1955. - 64 p. : ill. ; 24 cm. - Oxford visual series. .
300 300
Time.
529.7 / H761h