Brandis, Royall. Principles of economics. [electronic resource] . — Homewood, Ill., : R.D. Irwin,, 1968.. — xix, 693 p. : illus. 24 cm. LCCN: 67030238 Subjects--Topical Terms: Economics. LC Class. No.: HB171.5 / .B6949 Dewey Class. No.: 330