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Title: Poor and Incorrect Technical Content
Review: This is little more than a photography book. There is little technical content, and some of the diagrams have horrendous errors. You will never learn how a dispatcher knows a block is entered from the north or south, or the dilmenas faced by engineers and dispatchers when cab signaling fails, and why someone would design an electrical relay that is kept spinning like a top. Got a Sprint phone? The connection to Southern Pacific Railroad isn't even mentioned.
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