B. H. Haggin's Book of the Symphony (1937) came packaged with a rule to measure the distance from the outer groove of a record, ex. "the development section of the first movement of Beethoven's Fifth start[s] at 2 7/16 inches as recorded by Koussevitzky and the London Philharmonic." (407)

Horowitz says, "In fact, the symphony exists in score - every recording is precisely an interpretation, and as such privileges the culture of performance." (408) 

Victor produced The Victor Book of the Symphony, The Victor Book of Concertos, The Victor Book of the Opera, What We Hear in Music, Music and Romance, Form in Music, and Music Appreiciation for Children. Curriculum favored symphony, short list of German, French, Italian and Russian composers. Exclusion of contemporary music, American composers, jazz.  Spotlight on RCA performers. (405)