1. Ring-chromosom 18

   • J. Kunze
   • E. Stephan
   • M. Tolksdorf

   Übersichtsartikel Pages: 289 - 318

2. A phenotypic male with karyotype 45,X/45,X,ace+(?Yq-)

   • Johannes Nielsen
   • Ursula Friedrich
   • Lizzie Sand Strömgren

   Original Investigations Pages: 319 - 326

3. XXXY Klinefelter-Syndrom

   • W. Vormittag
   • M. Weninger

   Originalarbeiten Pages: 327 - 333

4. Phenotype frequencies for four serum proteins in Afghanistan: Two “new” albumin variants

   • Lowell R. Weitkamp
   • Alfred A. Buck

   Original Investigations Pages: 335 - 340

5. Effect of different serologic transformations of T₅ universes

   • Jan Hirschfeld

   Original Investigations Pages: 341 - 344

6. The rare “silent” allele P^O or P^V (P^Vienna) of human red cell acid phosphatase, typed in a second family

   • J. Herbich
   • K. Meinhart

   Original Investigations Pages: 345 - 348

7. A rapid banding technique for routine use in human and comparative cytogenetics

   • K. Sperling
   • R. Wiesner

   Original Investigations Pages: 349 - 353

8. Lactate dehydrogenase isoenzymes in oocytes and unfertilized eggs of mammals

   • Wolfgang Engel

   Short Communications Pages: 355 - 356

9. 46,XY/47,XY, 18+ Mosaicism with a 23-year survival

   • S. Gardó
   • Z. Papp
   • J. Walawska

   Clinical Case Reports Pages: 357 - 357

10. Genetic linkage relationships of the ADA and 6-PGD loci in “Humangenetik”

    • Lowell R. Weitkamp

    Letters to the Editors Pages: 359 - 360

11. Further observations on a previously reported case of 4p-syndrome

    • I. Šubrt
    • B. Blehová

    Letters to the Editors Pages: 361 - 363