00259nam a22001097a 4500003000400000008004100004082001900045100001000064245004600074260002200120300000700142OSt240110b        |||||||| |||| 00| 0 eng d  aR334.683bF60P  aF.A.O  aPopulation concepts in agril. cooperation  aRomebF.A.Oc1981  a53