RT Article T1 The Symbolism of the Mediaeval Corner Stone in the Mediaeval West JF Mediaeval studies VO 4 SP 43 OP 60 A1 Ladner, Gerhart B. 1905-1993 LA English PB Institution YR 1942 UL https://ixtheo.de/Record/1816088390 DO 10.1484/J.MS.2.306534