1. Age changes in the bone mineral of the lumbar spine in normal women

   • Tommy Hansson
   • Bengt Roos

   Clinical Investigations Pages: 249 - 251

2. Reorientable electric dipoles and cooperative phenomena in human tooth enamel

   • N. Hitmi
   • E. Lamure-Plaino
   • R. A. Young

   Clinical Investigations Pages: 252 - 261

3. Differentiation of osteoid-producing cellsin vitro: Possible evidence for the requirement of a microenvironment

   • H. C. Tenenbaum
   • J. N. M. Heersche

   Laboratory Investigations Pages: 262 - 267

4. Evidence for osteoclast production in mixed bone cell culture

   • Michael J. Marshall
   • Norman W. Nisbet
   • Philip M. Green

   Laboratory Investigations Pages: 268 - 274

5. The high affinity calcium inhibition of parathyroid adenylate cyclase is not calmodulin dependent

   • Susan B. Oldham
   • Loren G. Lipson

   Laboratory Investigations Pages: 275 - 281

6. Influence of glucocorticoids on calcium absorption in different segments of the rat intestine

   • James K. Yeh
   • John F. Aloia

   Laboratory Investigations Pages: 282 - 288

7. Effect of calcium deprivation on rat dams on fetuses and newborn offspring

   • Per Rasmussen

   Laboratory Investigations Pages: 289 - 292

8. The uptake of lithium ions by synthetic carbonated hydroxyapatite

   • I. Mayer
   • U. Berger
   • I. Gidalia

   Laboratory Investigations Pages: 293 - 295

9. Alkaline phosphatase inhibition by levamisole prevents 1,25-dihydroxyvitamin D₃-stimulated bone mineralization in the mouse

   • Marie-Thérèse Garba
   • Pierre J. Marie

   Laboratory Investigations Pages: 296 - 302

10. The assessment of intestinal calcium absorption using stable strontium

    • I. R. Reid
    • J. Pybus
    • H. K. Ibbertson

    Comment Pages: 303 - 305

11. Calcium homeostasis II: The sodium-potassium pump

    • D. J. Wirth
    • W. J. Heideger
    • K. W. Beach

    Rapid Communication Pages: 306 - 307

12. Announcements

    Announcement Pages: 308 - 308