Howdy,
this looks like very thorough and interesting work. It includes some history, transcriptions of a number of rhythms, etc. and it draws on interviews with both well-known and lesser known musicians, all crucial to the development, preservation and globalization of Guinean music

Vera Flaig. 2010. THE POLITICS OF REPRESENTATION AND TRANSMISSION IN THE GLOBALIZATION OF GUINEA'S DJEMBÉ. Unpublished Ph.D. Dissertation, University of Michigan.
http://deepblue.lib.umich.edu/bitstream/2027.42/75801/1/vhflaig_1.pdfHope you enjoy it & thanks to Vera for putting so much work and effort into this dissertation.