000			00279nam a2200097 4500
999			_c335417 _d335417
082			_a550 _bAHR.P
100			_aAhrens, L.H. et.al.
245			_aPhysics and Chemistry of the Earth, Vol. 8, Diagrams and Tables _cAhrens, L.H. et.al.
260			_aLondon _c1971 _bPergamon
942			_cBK