Muchtaridi, Musfiroh, I., Nugraha Hambali, N. and Indrayati, W. 2012. DETERMINATION OF ALCOHOL CONTENTS OF FERMENTATED BLACK TAPE KETAN BASED ON DIFFERENT FERMENTATION TIME USING SPECIFIC GRAVITY, REFRACTIVE INDEX AND GC-MS METHODS. Journal of microbiology, biotechnology and food sciences. 2, 3 (Dec. 2012), 933–946.