References Plas Halt railway station

boyd, james i.c. (1975) [1959]. festiniog railway 1800 - 1974; vol. 1 - history , route. british narrow gauge railway. blandford: oakwood press. isbn 978-0-85361-167-7. oclc 2074549. b1a. 
boyd, james i.c. (1975) [1959]. festiniog railway 1800 - 1974; vol. 2 - locomotives , rolling stock; quarries , branches: rebirth 1954-74. british narrow gauge railway. blandford: oakwood press. isbn 978-0-85361-168-4. oclc 874117875. b1b.