Cooper, Mario. Watercolor by design / Mario Cooper. - New York : WATSON-GUPILL , 1980 - 143 p. : ill. (some col.) ; 35 cm. Includes index ISBN: 0823056554 Subjects--Personal Names: Cooper, Mario Subjects--Topical Terms: Acuarelistas --- BiografíasPintura acuarela --- Técnicas LC Class. No.: ND 1839.C67 / A2 1980