Comparison of warfarin low-molecular-weight dextran, aspirin and subcutaneous heparin in prevention of venous thromboembolism following total hip replacement - Harris, W. H; Salzman, E. W; Athana-soulis, C; Waltman, A. C; Baum, S; DeSanctis, R. W (J. Bone Jt Surg, 1974)