00468pamaa2200169 4500 0000033841 20090807090000.0 0632042079 692.5 WIL 1998 TH435 WIL 1998 Willis Willi's elements of quantity surveving Andrew Willis, William Trench. 9th ed. Iowa: Blackwell, 1998. x, 356p.: ill.; 24cm. Building -- Estimates Trench, William