000			00422nam a2200145Ia 4500
008			210210b1973 xxu||||| |||| 00| 0 eng d
020			_a0 13 370569 2
082			_a300.72 BOLG
100			_aBOLLENS (John C).
245			_aGuide to participation: field work, role playing cases, and other forms.
260			_aNew Jersey. _bPrentice-Hall, Inc., _c1973
300			_axi,160
690			_aSocial Research
906			_a040777
999			_c90908 _d90908