[Dixielandjazz] just a question, help greatly appreciated

[dj outrage]

I am studdying music at university, and for my write up I would like to do
an essay on the effect that either duke ellington or paul whiteman had on
20th century popular music, ellington in the way he brought structure to
jazz or whiteman in how everything was very tightly arranged etc. What do
you guys think,? which would be better, and do you know any good books on
either of these figures I could read?
thanks in advance,
Rob.