Gavian, Ruth Wood, 1903- Our changing social order, [electronic resource] / by Ruth Wood Gavian, A.A. Gray [and] Ernest R. Groves.. — Rev. ed. Illustrated by James Daugherty.. — Boston, : D.C. Heath and Co., [c1941]. — 3 p. l., [v]-x, 736 p. : illus., diagrs. 21 cm.