Hydrologic Unit Map -- 1974, states of Massachusetts, Rhode Island and Connecticut
1 map : col. ; 49 x 93 cm.; Reprint 1989; An overprint of the 1:500,000-scale state base map. Shows counties, location and names of all cities and towns and most of the smaller settlements, railroads, and township and range lines in black; water features in blue; hydrologic boundaries and codes in red; county codes in green. No contours. Sheet 22 by 39 inches.