Tratman, Edward Ernest Russell (1901). Chapter 11. Water and Coaling Stations and Other Track Accessories. Railway Track and Track Work (вид. 2nd). New York, New York: Engineering News Publishing Company. OCLC2030207.
Tratman, Edward Ernest Russell (1901). Chapter 11. Water and Coaling Stations and Other Track Accessories. Railway Track and Track Work (вид. 2nd). New York, New York: Engineering News Publishing Company. OCLC2030207.