Hartung, Hans, 1904-1989. Hartung : Olis i aiguades damunt cartro, 1973-1977 / Rafael Santos Torroella - Barcelona : Poligrafa, 1978 - 104 p. : il. ; 21 cm. ISBN: 84-343-0262-4 Subjects--Personal Names: Hartung, Hans, 1904-1989 LC Class. No.: ND588.H34 S23