Pickering, James Sayre.
1001 questions answered about astronomy / James Pickering. - 3rd rev. ed. - London : Butterworth, 1969. - xi, 420 p. : ill. ; 22 cm.
Bibliography: p. 399-401.
Astronomy--Miscellanea.
QB44 / P63
520 / PIO
1001 questions answered about astronomy / James Pickering. - 3rd rev. ed. - London : Butterworth, 1969. - xi, 420 p. : ill. ; 22 cm.
Bibliography: p. 399-401.
Astronomy--Miscellanea.
QB44 / P63
520 / PIO