000			00446 a2200133 4500
245			_aCathedral, forge, and waterwheel _b : technology and invention in the Middle Ages _hprint
020			_a0060165901 (cloth) :
700			_aGies, Frances.
700			_aGies, Joseph.
005			20191017174149.0
260			_anyu _bHarperCollins Publishers _cc1994
084			_aT17 .G54 1994
300			_a357 p. : ill. _b 22 cm. _c357 p. : ill. ; 22 cm.
500			_aFrances & Joseph Gies.
999			_c11249 _d11249