00294nam a2200109Ia 450000500170000000800410001708200170005810000170007524500570009226000270014930000080017620260205040932.0260111s9999||||xx |||||||||||||| ||und||  a692.5  B151P  aBailey,  R G 0aPrinciples of builders estimating and final accounts  aLondonbLockwoodc1957  a146