000			00367nam a2200145Ia 4500
008			140317s9999 xx 000 0 und d
082			_a526.8
100			_aBlack,Earl D.
245			_aGraphical communication.
260			_aN.Y. _bMcGraw-Hill _c1959
300			_a328
650			_aAstronomy , Allied Sci.
653			_aAstronomy , Allied Science.
942			_2ddc _cBK
999			_c2377 _d2377