Roy, A. E. 1924-
Astronomy : principles and practice / A.E. Roy, D. Clarke. - 3rd ed. - Bristol : A. Hilger, 1987. - ix, 357 p. : ill.
0852743947
88990813
Astronomy.
QB43.2 / .R68 1987
520�19
Astronomy : principles and practice / A.E. Roy, D. Clarke. - 3rd ed. - Bristol : A. Hilger, 1987. - ix, 357 p. : ill.
0852743947
88990813
Astronomy.
QB43.2 / .R68 1987
520�19