R/V Lake Guardian.
Contributors: United States. Environmental Protection Agency. Great Lakes National Program Office.
Publisher: U.S. Environmental Protection Agency, Great Lakes National Program Office
Published: 1990
Place of publication: Chicago, Ill
Language: eng
Subjects: Lake Guardian (Ship); Ships -- Great Lakes; Water quality -- Great Lakes
Notes: Shipping list no.: 91-689-P.

"November 1990."

"DCN 905/9-901."