000			00344nam a22001217a 4500
082			_a311.2 HAL
100			_aHald, A
245			_aDecomposition of a series of observations : trend a periodic movement and a stochastic variable
260			_bG.E.C Gads forlag copenhagen, _c1948
300			_a134p. :
650			_aObservations
942			_cBK
999			_c525834 _d525834