Saut Adi H. Pane, Amira P. Tarigan & Adi Koesoema Aman. 2020. “COMPARISON OF D-DIMER LEVELS IN SMOKES THAT SUFFER CHRONIC OBSTRUCTIVE PULMONARY DISEASE WITH SMOKES THAT DO NOT SUFFER CHRONIC OBSTRUCTIVE PULMONARY DISEASE”. International Journal of Research Science and Management 7 (1):136-40. http://ijrsm.com/index.php/journal-ijrsm/article/view/79.