noun
a book or other source of information where the writer has taken the information from some other source and not collected it himself or herself
—compare primary source
noun
a book or other source of information where the writer has taken the information from some other source and not collected it himself or herself
—compare primary source
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005