000			00279nam a2200121Ia 4500
008			230416s9999||||xx |||||||||||||| ||und||
020			_a080523697X
050			_aT49.5 .D86 1979
100			_aDunn, P. D.
245		0	_aAppropriate technology :
260			_c1978
942			_2lcc _cBK
999			_c1210 _d1210