Complex sentence: For the next 45 years (May 1907 to January 1952), it was known as "The Blue Book Magazine" or "Blue Book Magazine", and that was shortened February 1952 to simply "Bluebook", continuing until May 1956.
Split into simpler sentences: For the next 45 years (May 1907 to January 1952), it was known as "The Blue Book Magazine" or "Blue Book Magazine". The title was shortened February 1952 to simply "Bluebook", continuing until May 1956.