1. Preface

   EditorialNotes Pages: 85 - 87

2. Heat sensitivity and membrane properties of metastasizing and non-metastasizing rat mammary tumors

   • Milton B. Yatvin
   • John W. Vorpahl
   • Charles E. Elson

   OriginalPaper Pages: 89 - 101

3. Effects of low level radiation upon the hematopoietic stem cell: Implications for leukemogenesis

   • E. P. Cronkite
   • V. P. Bond
   • J. E. Bullis

   OriginalPaper Pages: 103 - 114

4. Differences in the consequences of the decay of radioactive⁶⁴Cu atoms incorporated in cells under either in vitro or in vivo conditions

   • S. Apelgot
   • E. Guillé

   OriginalPaper Pages: 115 - 123

5. Mechanism of growth retardation of the adenocarcinoma EO 771

   • I. D. Bassukas
   • B. Maurer-Schultze

   OriginalPaper Pages: 125 - 141

6. Discussing possible standards of natural radioactivity in building materials

   • G. Keller
   • K. H. Folkerts
   • H. Muth

   OriginalPaper Pages: 143 - 150

7. Auger-electron cascades, charge potential and microdosimetry of iodine-125

   • J. Booze
   • H. G. Paretzke
   • P. Olkol

   OriginalPaper Pages: 151 - 162

8. 5-Fluorouracil treatment after irradiation impairs recovery of bone marrow functions

   • K. -H. v. Wangenheim
   • H. -P. Peterson
   • L. E. Feinendegen

   OriginalPaper Pages: 163 - 170