000 00311nam a2200181 4500
020 _a
082 _a305.509 41 HOP/S
100 _aEarl Hopper
245 _aSocial mobility
250 _a
260 _a
_b
300 _a335p
_c
500 _a
505 _a
650 _a
700 _a
942 _cBK
999 _c16394
_d16394