Indigo in the Arab World - Jenny Balfour-Paul - Google Books

http://books.google.de/books?id=DX1qTSlQrS0C&pg=PA152&redir_esc=y#v=onepage&q&f=false

The role indigo has played elsewhere has been fairly well documented, but in the case of the Arab world, little or no thorough investigation has been previously undertaken. Sets out to provide comprehensive coverage of the subject from its earliest history…