Spear, Mary Eleanor. Charting statistics / Mary Eleanor Spear, - New York, McGraw-Hill, 1952. - 253 p. illus. 24 cm. LCCN: 51012648 Nat. Bib. No.: GB52-12420 Subjects--Topical Terms: Statistics--Graphic methods. Dewey Class. No.: 310.0222 / SPC 1952