Dòng Nội dung
1
The dinosaur mystery / Gertrude Chandler Warner ; Charles Tang.
Morton Grove, Ill. : A. Whitman, 1995.
121 p. : ill. ; 22 cm.

When the Aldens go to the Pickering Natural History Museum to assist with the opening of a dinosaur exhibit, their work is hampered by a series of mysterious happenings.