Klee, V. (1991). Old and new usloved problems in plane geometry and number theory. MAA.
Chicago Edition CitationKlee, Vict. Old and New Usloved Problems in Plane Geometry and Number Theory. MAA, 1991.
MLA Edition CitationKlee, Vict. Old and New Usloved Problems in Plane Geometry and Number Theory. MAA, 1991.
Warning: These citations may not always be 100% accurate.