Understanding maps, charts, graphs, and tables / by Irwin L. Joffe. Joffe, Irwin L. Reading (Higher education) LB2395 .J57 912 JOU Title from p. [4] of cover. Belmont, Calif. : Wadsworth Pub. Co., 1970 1970 1970 Text 90 p. : eng Opportunity for skillful reading series,