Blake, Robert R. 1918-2004. Guideposts for effective salesmanship [electronic resource] / [by] Robert R. Blake and Jane Srygley Mouton.. — [Chicago, : Playboy Press,, 1970]. — 210 p. 18 cm. — (Playboy Press executive library). "Original title: The grid for sales excellence." Bibliography: p. 208-210. Subjects--Topical Terms: Sales personnel.Selling. LC Class. No.: HF5438 / .B663 1970b