Keywords: ernest n. ljunggren special collection photo ernestnljunggrenspecialcollectionphoto â 1939 â1939 worcester polytechnic institute worcesterpolytechnicinstitute blackandwhite monochrome outdoor black and white Catalog #: 09_02083 Title: Ernest N. Ljunggren Special Collection Photo Date: 1939 Additional Information: A sign which reads ""Private Grounds. Worcester Polytechnic Institute. For pleasure vehicles only."", Tags: Ernest N. Ljunggren Special Collection Photo, 1939 Repository: San Diego Air and Space Museum Archive Catalog #: 09_02083 Title: Ernest N. Ljunggren Special Collection Photo Date: 1939 Additional Information: A sign which reads ""Private Grounds. Worcester Polytechnic Institute. For pleasure vehicles only."", Tags: Ernest N. Ljunggren Special Collection Photo, 1939 Repository: San Diego Air and Space Museum Archive |