Unger, K M Selection of an exercise program for patients with chronic obstructive pulmonary disease. [electronic resource] - Heart & lung : the journal of critical care - 68-76 p. digital Publication Type: Journal Article ISSN: 0147-9563 Subjects--Topical Terms: AdultAgedExercise TherapyHumansLung Diseases, Obstructive--therapyMiddle AgedPatient Care Planning