00467ntaaa2200169   45000030003000000050017000030080021000200400037000410820012000781000027000902450060001172500010001772600043001873000013002305000034002436500020002770120251027200621.00714s1973  ag    01   aAR-BaBNbspacAR-BaBNeaacrdRIC  a361 Yo8  aYoungdahl, Benjamin E   aSocial action and social work / cBenjamin E Youngdahl,  a1 ed.  aNew York : bAssociation Press, c1966  ax, 190 p  aAcción social y obra social  aServicio Social