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2. “Active Bronchopulmonary Lithiasis,”;Freedman;Radiology,1949
3. “Late Nontuberculous Complications of Calcified Hilus Lymph Nodes,”;Head;Am. Rev. Tuberc.,1949
4. “Broncholithiasis, Report of Six Cases,”;Lell;Tr. Am. Broncho-Esophagol. A.,1947
5. “Perforation of Both Main Stem Bronchi by a Large Broncholith Located in the Subcarinal Region,”;Penta;Am. Otol., Rhon. and Laryng.,1949