1. 03. English Easy Reading Hopper / by Pfister, Marcus. Publication: New York : North-South Books, 1991 . p. cm. , Translation of: Hoppel. Date:1991 Availability: Copies available: (1), Actions:
2. 03. English Easy Reading Hopper's Easter surprise / by Siegenthaler, Kathrin. Publication: New York : North-South Books, 1993 . [24] p. : 30 cm. Date:1993 Availability: Copies available: (2), Actions: