From what info I could find on the internet; this appears to be a reprint done somewhere in the ~1980s, so this is book is NOT from 1941. I could not find an exact date of printing inside the book otherwise.  

Length: 10.75 in

Width: 8.25 in

Height: 0.5 in

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Most-Often-Needed 1926-1938 Volume One Radio Diagrams and Servicing Information - M.n. Beitman, Supreme Publications, Vintage Radio Co. - ISBN: O-914126-08-3