array(2) { [0]=> int(0) [1]=> array(12) { ["ref_doc_id"]=> int(9676986) ["publisher_code"]=> int(54) ["base_code"]=> int(196) ["book_code"]=> int(1) ["page"]=> string(3) "112" ["sort"]=> int(56) ["body"]=> string(100) "1) Thurlbeck, W. M.:Chronic airflow obstruction in lung disease. W. B. Saunders, Philadelphia, 1976." ["mol"]=> NULL ["pubmed"]=> NULL ["doi"]=> NULL ["group_id"]=> int(3) ["internal_flag"]=> bool(false) } }