Source: East High School, 1958 Yearbook. Ads – 1, page 228
Park Plant
Barber-Colman, ad – 1962, aerial
Rock Street Plant pictured above
Park Plant above
Source: Rockford Morning Star and Rockford Register-Republic “Century Plus 10” Special Edition, March 1962
Barber Colman, 1960 – Yearbook ad
Source: West High School, 1960 Warriors Yearbook