00705nam a2200193Ia 4500003000900000008004100009020001800050040001600068080001600084110007000100245010700170260004500277300001600322650001800338650004100356942000700397999001500404952009200419IN-BaIIA211028s9999    xx            000 0 eng d  a0-309-03335-7  cIIA Library  a52:524bASC  aAstronomy Survey Committee (National Academy Press (U.S.))914163 0aChallenges to astronomy and astrophysicscAstronomy Survey Committee                                    aWashingtonbNational Academy Pressc1983  axxii, 272p.  aAstronomy980  aAstronomy and astrophysics thesaurus  cBK  c8451d8451  00104070aBANbBANcGENd1985-09-05l0o52:524/ ASCp9303r2021-11-05w1985-09-05yBK