1. Positive mediastinoscopy: an ominous finding;Fosburg;Ann Thorac Surg,1984
2. Lung cancer: surgical aspects overview;Henney;Prog Cancer Res Ther,1979
3. Bronchoscopic needle aspiration biopsy of paratracheal tumours;Wang;Am Rev Resp Dis,1978
4. Transbronchial needle aspiration in the diagnosis and staing of bronchogenic carcinoma;Wang;Am Rev Resp Dis,1983
5. Transbronchial needle aspiration in clinical practice;Harrow;Thorax,1985