00469    a2200133   4500020001500000050001900015100002700034245012100061264003600182300003800218500001900256650003900275700002100314  a0393955362  aQA109.CHA 1984  aHudson Deboraheauthor  aThe challenge of the unknown :b teaching guide to accompany the film series/cDeborah A. Hudson and Joshua G Miller  aNew York :b Norton,c ♭1986.  a276 pages : illustrations ; 27 cm  alncludes index  aMathematics -- Study and teaching.  aMiller, G Joshua