R-T, Margaret, and the Rats of NIMH

From Author Wars - https://authorwars.com/books/r-t-margaret-and-the-rats-of-nimh-1978877.html

Overview:

Title: R-T, Margaret, and the Rats of NIMH
Author: Leonard B. Lubin
Year: 1990
Type: Cover Art

Variant Titles:

1990. R-T, Margaret, and the Rats of NIMH