=LDR 22 4500 =001 4198 =082 04$a941.507 PET =100 1\$aPetty, William =245 10$aThe Petty Papers: some unpublished writings of Sir William Petty =260 \\$aNew York :$bAugustus M. Kelley,$c1967 =650 \0$aBooks =700 1\$aLansdowne, Marquis of =852 \\$bFreeman Library$h941.507 PET$zNot located