1. Crystal and stone retention

   • J. M. Baumann

   Editorial Pages: 61 - 61

2. Chemical factors governing the state of saturation towards brushite and whewellite in urine of calcium stone formers

   • D. Ackermann
   • J. M. Baumann

   Originals Pages: 63 - 65

3. Stone formation in human kidney

   • F. Hering
   • Th. Briellmann
   • G. Rutishauser

   Originals Pages: 67 - 73

4. Detection of crystallization inhibitory activity of whole urine with a gel model

   • M. K. Li
   • D. K. Y. Shum
   • S. Choi

   Originals Pages: 75 - 77

5. Measurement of the risk of calcium phosphate crystallization in urine

   • H.-G. Tiselius

   Originals Pages: 79 - 81

6. Inhibition of calcium oxalate crystallization in urine

   • H.-G. Tiselius
   • A. M. Formander
   • M. A. Nilsson

   Originals Pages: 83 - 86

7. The effect of serum on the crystallization of calcium oxalate in whole human urine: Inhibition disguised as apparent promotion

   • K. A. Edyvane
   • R. L. Ryall
   • V. R. Marshall

   Originals Pages: 87 - 92

8. Experimental determination of the kinetics of calcium-binding with chondroitin sulphate and the effects of uric acid on this process

   • A. Hesse
   • H. Wurzel
   • W. Vahlensieck

   Originals Pages: 93 - 97

9. Fasting gastrinemia and elevated supersaturation with hydroxyapatite of fasting urine — Observations in renal calcium stone patients and controls

   • P. O. Schwille
   • G. Rümenapf
   • J. H. Weippert

   Originals Pages: 99 - 104

10. Sodium is neither a risk nor a protective factor in urolithiasis?

    • P. P. Singh
    • A. K. Pendse
    • P. K. Dashora

    Originals Pages: 105 - 108

11. Disturbed urinary transport in the pelvi-calyceal system in calcium-oxalate stone patients

    • E. Schulz
    • E. Hengst
    • H. Günther

    Originals Pages: 109 - 113

12. Abstract of the 13th Urolithiasis Symposium Bonn-Vienna

    Originals Pages: 115 - 130

13. Announcements

    Announcement Pages: 132 - 132