00285nam a2200109 a 4500008004100000050001500041100001800056245004200074246003900116260001100155350000900166120416s9999    ||||||||||||||||| ||    u  aNA 480 Fit  aFitchen, John14aThe construction of gothic cathedrals  aa study of medieval vault erection  a[1961]  a0.00