004210000a22001330004500003000900000005001700009110006300026245006200089264008200151300001000233041000800243650001600251650002000267PH-MaWHO20241108112127.0  aUnited Nations. Department of Economic and Social Affairs.  aService by youth : a survey of eight country experiences.  aNew York : bUnited Nations Department of economic and Social Affairs,c1975.  a103p.  aeng  aAdolescence  aSocial services