Figure 4. -- Structural design of the engineman's cab front (turbotrain)
National Transportation Safety Board (NTSB)
<a class="external free" href="https://en.wikisource.org/wiki/Page:NTSB_RAR-81-4.pdf/15">https://en.wikisource.org/wiki/Page:NTSB_RAR-81-4.pdf/15</a>