{"id":"heaps1978information","URL":"https://openlibrary.org/works/OL6796482W","type":"book","title":"Information Retrieval: Computational and Theoretical Aspects","author":[{"given":"H. S.","family":"Heaps"}],"issued":{"date-parts":[[1978]]},"year-text":"1978","container-title":"Academic Press","catalog-key":"SRC0D8MR6F610JB"}