1. Problems of research and development in health services

   • J. H. U. Brown

   Guest Editorial Pages: 231 - 237

2. Artificial intelligence and brain theory: Unities and diversities

   • Michael A. Arbib

   OriginalPaper Pages: 238 - 274

3. Dynamic vagal control of atrial-ventricular condition: Theoretical and experimental studies

   • Paul Martin

   OriginalPaper Pages: 275 - 295

4. Effective length of the arterial system

   • P. Sipkema
   • N. Westerhof

   OriginalPaper Pages: 296 - 307

5. Dipole moment of the hearts of various species

   • C. V. Nelson
   • B. C. Hodgkin
   • P. R. Gastonguay

   OriginalPaper Pages: 308 - 314

6. A simulation study of transient changes in splanchnic and peripheral blood flows in the dog after a volume load

   • Jerry Franklin Green
   • Alan P. Jackman

   OriginalPaper Pages: 315 - 321

7. An intravascular test device for thromboresistant materials: Analysis and preliminary experimental evaluation

   • Eric F. Grabowski
   • Anne R. Derby
   • Edward F. Leonard

   OriginalPaper Pages: 322 - 341