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

From Author Wars - https://authorwars.com/books/rt-margaret-and-the-rats-of-nimh-1978879.html

Overview:

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

Variant Titles:

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