por Hobbs, Betty C. (Betty Constance) [autor] | Roberts, Diane [autor] | Ducar Maluenda, Pedro [traductor].
por Roberts, Diane [editor] | Skinner, F. A [editor] | Corry, Janet E. L [editor].
por Roberts, Diane [editor] | Hooper, William L [editor] | Greenwood, Melody H [editor].