Kruptseva, N.D.2016-07-212016-07-212014Kruptseva, N.D. Chewing gum- 5000 years of history [Текст] / N.D. Kruptseva ; EL Adviser A.M. Diadechko // To Live in a Safer World : materials of the eighth scientific practical student`s student`s, postgraduate’s and teacher’s of LSNC of the foreign languages department, Sumy, March, 28, 2014 / Відп. за вип. Г.І. Литвиненко. - Sumy : Sumy State University, 2014. - С. 149.http://essuir.sumdu.edu.ua/handle/123456789/45611Chewing gum is a soft, cohesive substance intended for chewing but not swallowing. Humans have used chewing gum for at least 5,000 years. Chewing gum in various forms has existed since the Neolithic period. 5,000-year-old chewing gum made from bark tar, with tooth imprints, has been found in Kierikki, Yli-Ii, Finland.encneсhewing gumжувальна гумкажевательная резинкаhistoryісторіяисторияoral healthгігієна порожнини ротаздоровье полости ртаTheses