Mentioned here List of Indian beverages#Traditional. A few references based on a quick search that need careful scrutiny: , , ,  (see page 19).Regarding the current citation, a page-by-page scanned version (warning: link might trigger download of TIF scanned image file) of what possibly could be the referred book "Bharater Adibasi" is available on Digital Library of India here.  Since you are listed on WP:Translators available#Bengali-to-English, could you please help investigate? Thanks. ←  talk