000			00418pam a2200145a 44500
082			_aNASA _bTN D-7065
100			_aChi,A R
245	1		_aA STEP IN TIME _bCHANGES IN STANDARD-FREQUENCY AND TIME-SIGNAL BROADCASTS-JANUARY 1,1972
260			_a _bNasa, Washington, D.C. _c1973
300			_a31
500			_aBound With Nasa Tn D-7060-7064,7066-7069
700			_aFosque,H. S
964			_gCIRC
997			_aTR12748 C
999			_c397113 _d397113