Harper, F. A. 1905-1973. Why wages rise / [electronic resource] / F.A. Harper.. — New IHS ed.. — Menlo Park, Calif. : : Institute for Humane Studies,, 1957.. — 104 p. : : ill. ; 20 cm. - Studies in economics ; no. 7.. ISBN: 0896170330 9780896170339 LCCN: 57006929 Subjects--Topical Terms: Wages.