MCMLI = 1951 and at that time it was sold only the scores in small illustrated street format. There was no staff in F clef, but only the staff in G clef for the melody. Long before this date the name of the chords was not even mentioned. It was necessary to determine the key from the clef and its framework. In this illustrated format, the names of the chords are mentioned and it's up to you to make your rhythmic according to the names of the chords. Lionel