Washington State Planning Council & Chittenden, H. M. (1936). The Cascade low level tunnel: An inquiry as to economic feasiblity of building a tunnel through the Cascade range in Washington for rail and vehicular traffic as proposed by the late Brigadier General H. F.[!] Chittenden.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington State Planning Council और Hiram Martin Chittenden. The Cascade Low Level Tunnel: An Inquiry as to Economic Feasiblity of Building a Tunnel Through the Cascade Range in Washington for Rail and Vehicular Traffic as Proposed by the Late Brigadier General H. F.[!] Chittenden. [Olympia, 1936.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington State Planning Council और Hiram Martin Chittenden. The Cascade Low Level Tunnel: An Inquiry as to Economic Feasiblity of Building a Tunnel Through the Cascade Range in Washington for Rail and Vehicular Traffic as Proposed by the Late Brigadier General H. F.[!] Chittenden. 1936.