00538naa#a2200169#i#450# EN\INFRA-M\bibl\2053 20240502081600.4 1998-0728 20140417b2014####ek#y0engy0150####ca RUS RU Continuity Between the Primary and the Secondary Schools as One of the Principles for Biology Education Development Journal article Moscow INFRA-M Academic Publishing LLC. 2014 6 с. Journal article local Kalinova G. S. naukaru.ru