Benton Harbor–St. Joseph inset from the October 1, 1957, <i>Official Highway Map</i>
<a href="https://en.wikipedia.org/wiki/Michigan_State_Highway_Department" class="extiw" title="w:Michigan State Highway Department">Michigan State Highway Department</a>
Michigan State Highway Department (October 1, 1957). <i>Official Highway Map</i> (Map). Scale not given. Lansing: Michigan State Highway Department. Benton Harbor–St. Joseph inset. <a href="https://en.wikipedia.org/wiki/OCLC" class="extiw" title="w:OCLC">OCLC</a> <a rel="nofollow" class="external text" href="https://www.worldcat.org/oclc/12701120">12701120</a> and <a rel="nofollow" class="external text" href="https://www.worldcat.org/oclc/367386492">367386492</a>.