#1
I think some reference to the physical changes in the
guitar would be important. I'm also interested in the changing role of
the guitar and how it's status develops. Also the global reach and
dissemination of the guitar in the 20th century needs to be mentioned

Above is a reply i got from my lecturer. can anyone explain to me what does 'global reach and dissemination of the guitar in the 20th century' mean?
#4
Wikipedia and Google can give you everything what you want .. I think you should try Google for searching anything.