1. Clemmesen, J.: On the incidence of gastric carcinoma in Denmark and some other countries. Acta Un. int. Cancr. 17, 288 (1961).
2. Dorn, H. F., and S. J. Cutler: Morbidity from Cancer in the United States. Publ. Hlth Monogr. No 56 (1958).
3. Fleischmann, E.: Krebsvorschau f�r �sterreich. Wien. med. Wschr. 112, 199 (1962).
4. Freudenberg, K.: Hat der Krebs zugenommen? Strahlentherapie, Sonderb. 41, 311 (1959).
5. Gilliam, A. G.: Trends of mortality attributed to carcinoma of lung; possible effects of faulty certification of deaths to other respiratory diseases. Cancer 8, 1130 (1955).