000			00407 a2200145 4500
245			_aLearning thru discussion _hprint
020			_a0803900449
250			_a[Rev. ed.]
650			_aENG
005			20191021095515.0
260			_acau _bSage Publications _c[1969]
084			_aLC6515 .H5 1969
300			_a60 p. 22 cm. _b60 p. 22 cm. _c60 p. 22 cm.
500			_aWith an introd. by Herbert A. Thelen.
999			_c12324 _d12324