00327pab a2200109 454500008004000000100002300040245007100063260000900134300001100143650002400154773003900178180718b1985   xxu||||| |||| 00| 0 eng d  aZiegler, Joseph A.  aDemographic change and implications for planning economic strategy  c1985  a179-87  aPopulation - U.S.A.  aSocio - Economic Planning Sciences