1. Hormonal factors in human carcinogenesis

   • F. de Waard

   Guest Editorial Pages: 177 - 180

2. Sectional analysis of tumor colony growth in the soft-agar assay: Effects of oxygen

   • Dominic Fan
   • Susan Fan
   • Lee Roy Morgan

   Original Papers Pages: 181 - 185

3. Comparative light and scanning electron microscopic observations of nasal cavity carcinogenesis in rats treated with 1,4-dinitrosopiperazine

   • H. Tsuda
   • T. Takano
   • N. Ito

   Original Papers Pages: 186 - 191

4. Spontaneous tumors and lifespan of female NMRI mice of the outbred stock sut: NMRT during a lifetime study

   • H. Löhrke
   • B. Hesse
   • K. Goerttler

   Original Papers Pages: 192 - 196

5. Establishment of an ascitic human melanoma cell line that metastasizes to lung and liver in nude mice

   • M. Katano
   • R. E. Saxton
   • R. F. Irie

   Original Papers Pages: 197 - 203

6. In vivo and in vitro binding of 1,2-dibromoethane and 1,2-dichloroethane to macromolecules in rat and mouse organs

   • G. Arfellini
   • S. Bartoli
   • S. Grilli

   Original Papers Pages: 204 - 213

7. Leukemia induction by methylnitrosourea (MNU) in selected mouse strains

   • Hans Joachim Seidel
   • Ludwika Kreja

   Original Papers Pages: 214 - 220

8. Metabolism of, and DNA methylation by, N-nitrosomethylbenzylamine in chicken

   • W. C. Tang
   • P. Z. Lin
   • M. Wiessler

   Original Papers Pages: 221 - 226

9. Study of retinol-binding protein in pancreatic cancer

   • C. Fabris
   • A. Piccoli
   • R. Naccarato

   Original Papers Pages: 227 - 229

10. Effects of ascorbic and dehydroascorbic acid on the multiplication of tumor ascites cells in vitro

    • F. S. Liotti
    • A. R. Menghini
    • M. Bodo

    Original Papers Pages: 230 - 232

11. Clonal growth of human tumor xenografts

    • H. Henß
    • H. H. Fiebig
    • G. W. Löhr

    Original Papers Pages: 233 - 235

12. Prognostic significance of intraperitoneal free cancer cells in gastric cancer patients

    • S. Koga
    • N. Kaibara
    • H. Hiraoka

    Original Papers Pages: 236 - 238

13. Reduction of carcinogenicity of N-nitrosomethylurea by indomethacin and failure of resuming effect of prostaglandin E₂ (PGE₂) against indomethacin

    • T. Narisawa
    • P. Hermanck
    • D. Schmähl

    Original Papers Pages: 239 - 242

14. Deficiency of N-acetyl-β-d-glucosaminidase in neutrophils of cancer patients

    • P. Moszczyński
    • J. Lisiewicz

    Original Papers Pages: 243 - 245

15. Naloxone as an adjuvant in chemotherapy of an experimental tumor

    • U. Sjölander
    • G. Ronquist
    • R. Hugosson

    Short Communications Pages: 246 - 248

16. Antineoplastic activity of esters and amides of N-[N′-(2-chloroethyl)-N′-nitrosocarbamoyl]-aminoacids

    • W. J. Zeller
    • K. Ehresmann
    • G. Eisenbrand

    Short Communications Pages: 249 - 251

17. Acquired disturbance of erythrocyte glutathione reductase in experimental tumors

    • Orlando C. O. Barretto
    • Szulin Ber Zyngier

    Short Communications Pages: 252 - 253

18. Immunologic response to the treatment of Ehrlich ascites tumor with titanocene dichloride

    • P. Köpf-Maier
    • A. Hesse

    Short Communications Pages: 254 - 255

19. Lung cancer mortality of workers employed in chromate pigment factories

    • R. Frentzel-Beyme

    Letter to the Editor Pages: 256 - 256