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xii OCCUPATIONAL TUMORS AND ALLIED DISEASES PAGE ' Die Gefahr die Roentgenkarzinoms als Folge der Strahlenbehandlung. Strahlentherapie 42:514, 1931. 253 Sites of therapeutic Roentgen Cancers Holthusen, H. and Englmann, K.: Same as above. 313 Gastric cancer mortality in different social groups in Bavaria Cramer, W.: Importance of Statistical Investigations in Campaign Against Cancer. Am. J. Cancer 29:1-19, 1937314 ' Site of cancer in unskilled workers hav ing contact with tar Peller, S.: Die Rolle des Reizes in der Pathogenese des menschlichen Krebses. Klin. Wchnschr. 15:217, 1936. 337 Age distribution of intestinal polyps Hullsiek, H. E.: Multiple polyposis of colon. Surg., Gynec. & Obst. 47:346, 1928. 343 Relation of primary liver cancer to cir rhosis of liver Stewart, M. J.: Precancerous lesions of alimentary tract. Lancet 2:565, 617, 669, 1931. 351 Experimental production of cancer of liver with 1.2.5.6-dibenzanthracene Andervont, H. B.: Susceptibility of 5 inbred strains of Mice to Liver Changes Induced by Subcutaneous Injection of 2-amino-5-azotoluene. Public Health Rep. 54:1986, 1939. 371 Lung cancer incidence Cole, P. P.: The Cancer Problem-- Present Position with Regard to Prevention. J. State Med. 43:272, !93 5Stocks, P. Distribution in England and Wales of Cancer of Various Organs. Brit. Empire Cancer Cam paign, Ann. Rep. 13:257, 1936. Kennaway, N. M. and Kennaway, E. L.: Study of incidence of can cer of lung and larynx. J. Hyg. 36:236, 1936. Weller, C. V.: Pathology of primary carcinoma of lung. Arch. Path. 7: 478j 1929. Simons, E. J.: Primary Carcinoma PAGE of the Lung. Chicago, The Year book Publishers, Inc., 1937. 385 Age incidence of lung cancer McCrae, T., Funk, E. H. and Jackson, C.: Primary carcinoma of bronchi. J.A.M.A. 89:1140, 1927. 386 Age Incidence of Bronchiogenic Car cinoma Matz, P. B.: Incidence of primary bronchiogenic carcinoma. J.A.M.A. 111:2086, 1938. 397 Post-mortem exam, of miners Reports of the Miner's Phthisis Medi cal Bureau of South Africa, 1932 and 1935. 397 Incidence of pulmonary tumors--exam ined in Saranac laboratory Vorwald, A. J. and Karr, J. W.: Pneumoconiosis and pulmonary carcinoma. Am. J. Path. 14:49-58, *938. 399 Pulmonary tumors in experimental ani mals after inhalation of silica dust Vorwald and Karr: Same as above. 421 Soot in air Kennaway, E. L.: The Anatomical Distribution of the Occupational Cancers. J. Indust. Hyg. 7:69, I925422 Relation between degree of bituminosis and incidence of lung cancer Schnurer, L.: Further studies on rela tion of pneumoconiosis to respira tory diseases in Pittsburgh district. J. Indust. Hyg. 20:14, 1938. 425 Age distribution of lung cancer in gas plants Kawahata, K.: Ueber die gewerblich hervorgerufenen Lungenkrebse bei Generator-Gas-Arbeitern in den Stahlwerken. Gann 32:367, 1938. 431 Effect of cutaneous tarring on incidence of pulmonary tumors Bonne, C.: Ueber Geschwuelste bei Teertieren. Ztschr. f. Krebsforsch. 25:1, 1927. 444 Age incidence of lung cancer in miners Uhlig, M.: Ueber den Schneeberger Lungenkrebs. Virchow's Arch. 230: 76, 1921.