| GMD | Text |
| Classification | F MAR |
| Publisher | Boston, Houghton Mifflin Co., ©1972 |
| Subject | Children's stories, American.Friendship -- Pictorial works -- Juvenile fiction.Hippopotamus -- Pictorial works -- Juvenile fiction. |
| Topic | Grade 2-3 Reading (420L-820L) |
| Description | 47 p. : col. ill. ; 21 cm. |
| ISBN | 9780395199725 |