000			00316nam a2200133Ia 4500
001			122607
008			170722s9999 xx 000 0 und d
100			_aWatt, Sb
245			_aHanddug wells and their construction. /
260			_bELBS , _c1977.
300			_a253 p. _c21cms
700			_aWood , We
942			_cGEN
999			_c160417 _d160417