Hello,
I found a very nice FREE Banana monograph.
"ACIAR has funded research in Western Samoa, Tonga and the Cook Islands in collaboration with the Queensland Department of Primary Industries to introduce banana varieties resistant to the highly damaging leaf disease black sigatoka. This guide will aid the introduction and adoption of appropriate disease-resistant varieties by assisting with their classification and identification through keys, lists and photographs."
http://aciar.gov.au/publication/mn033cheers
Andy