Date of Version
March 1977
Recommended Citation
Kendal, Hugh, "History and Review of Railway-Highway Grade Crossing Warning Systems and the Genesis of Standard Specification" (1977). Purdue Road School. 15.
https://docs.lib.purdue.edu/roadschool/1977/proceedings/15
Start Date
3-8-1977 12:00 AM
COinS
Mar 8th, 12:00 AM
History and Review of Railway-Highway Grade Crossing Warning Systems and the Genesis of Standard Specification
