The answer to this question is Thesaurus.
A thesaurus list words or phrases that mean almost the same thing.
Periodicals are magazines, newspapers and journals.
Books are filled with information and knowledge or are filled with stories and fantasy.
Encyclopedias are sets of book that give information and many different topics.
So the answer here would be that a Thesaurus is not a good source for the topic of “The Eating Habits of Kangaroos”