00297nam a2200109Ia 4500008004100000041000800041082001000049100002000059245004800079260004100127999001900168231107s1989    xx            000 0 und d  aeng  a723.5  aWalker Frank R.  aWalker''s Building estamator Reference book  aAmericabFrances Lincoln Ltd. c1989  c921932d921932