Who wrote the Disney film Tarzan?

Edgar Rice Burroughs is the creator of Tarzan. the first Tarzan novel came out in l9l2, so next year is the Tarzan centennial as well as that of the Titanic. Burroughs did not write all of the Tarzan novels, other writers were involved. One of them, Tarzan and the Princess, involves a Girl who is a surviving noblewoman of White Russian background- what a combo- Tarzan and Anastasia! This was Never made into a movie.