00286nam a2200109Ia 450000500170000000800410001708200120005810000240007024500290009426000450012330000080016820260224040935.0260224s9999||||xx |||||||||||||| ||und||  a693 DAL  aJames Ralph Dalzell 0aMasonry simplifiedition   aAmerican: Technical Society; Pressc1956  a463