00393nam a2200133Ia 4500008004100000041000800041082001600049100002500065245006200090260005900152300001600211365001100227650002100238210719s1981    xx            000 0 und d  aeng  a331.11 SCHI  aSCHULTZ (Theodore W)  aInvesting in people: the economics of population quality.  aDelhibHindustan Publishing Corporation (India).c1981  axii,173bHB  b20cRs  aLabour Economics