A fellow that I met at the last Sierra Nevada Chapter show mentioned a book by Samuel W. Taylor called "Line Haul." It's the the story of Pacific Intermountain Express, published by Filmer Publishing Co during 1959. I found a copy on the web and ordered that copy, it came about a week ago. I've started to read it and from what I've read so far, this is a very informative book. It certainly should be on a list of anyone that is wanting to learn about LTL trucking in the 1940 and 1950s. I found this copy for $17.00 plus tax and shipping, it was well worth the expense.
As a bonus, as I was leaving through the book, I found the above pictured business card. Maybe, it belong to the owner of this book, who was the branch manager of the terminal at Waterloo, Iowa.
Seeing how it wasn't until 2009 that I got a "bid" truck with air conditioning, I found this passage interesting and true to form.
"It is hot in the cab..."
"How about this desert run in the summer?"
"Hank Shaffer indicates that aluminum box (dog house). 'It gets so hot you can't put your hand on it. Sometimes I put a quilt over it.' The heat used to bother him, but of recent years he doesn't mind it so much. It's partof the job. 'You just have to take it.'"
Hope this helps someone pursue trucking history!