I want to know the answer to the following question:
Who was responsible for 2/3 of all recordings in the 1930s?
All the background I'm provided with is that "Radio transcription producers such as World Broadcasting System and Associated Music Publishers (AMP) were the dominant licensees of the Western Electric wide range system and towards the end of the 1930s were responsible for two-thirds of the total radio transcription business.". Is that enough to answer the question?
Answer: yes