EDITORIAL
The Decline in Primary Tooth Decay in New Zealand Before the Use of Fluorides
  John Colquhoun; Auckland, NZ ... 1-4

ORIGINAL ARTICLES
Liver and Lung Aryl Hydrocarbon Hydroxylase Activity in Benzo(a)-pyrene Treated Rats: Lack of Effect of Hydrogen Fluoride
  G Bompart, J Rakotoarivony, Y. Manuel;
Toulouse Cedex France ... 5-12

NaF Efficacy in the Otospongiotic-Otosclerotic Disease. Seven Series of Experiments
  Jean R Causse, J Bernard Causse, George E. Shambaugh,
  Paul Bretlau, José Uriel, Josette Berges;
  Béziers, France ... 13-21

Variations of F in Relation to Other lons in Drinking Water
  T Yasui, S Nakao, S Tanaka and
  M. Miyamoto; Saitama, Japan ... 22-27

Changes in the Collagen Structure of Bone Tissue in Experimental Fluorosis
  M Bély, T Pintér, Nóra Sándorfi,
  I Ratkó; Budapest, Hungary ... 28-31

Ultrastructural Findings in Liver, Kidneys, Thyroid Gland and Cardiac Muscle of Rabbits Following Sodium Fluoride Administration
  Zhan Chongwan and Huo Daijei;
  Guizhou, China ... 32-38

REVIEW ARTICLE
Endemic Skeletal Fluorosis: Clinical and Radiological Variants (25 Years of Personal Research)
  SPS Teotia, M Teotia;
  Meerut, India ... 39-44

ABSTRACTS
Parathyroid Glands, Calcium and Vitamin D in Experimental Fluorosis in Pigs
  L Andersen, A Richards, AD Care,
  HM Andersen, J Kragstrup, O Fejerskov;
  Aarhus, Denmark ... 45

The Hastings Fluoridation Experiment: Science or Swindle? (A Clinical-Historical Reassessment)
  John Colquhoun, Robert Mann;
  Auckland, New Zealand ... 45-46

Fluoride, Altitude and Dental Fiuorosis
  F Manji, V Boelum, O Fejerskov;
  Nairobi, Kenya ... 47-48

Therapy for Osteoporosis: Characterization of the Skeletal Response by Serial Measurements of Serum Alkaline Phosphatase Activity
  Sally MG Farley, Jon E Wergedal,
  Lynna C Smith, Mark W Lundy,
  John R Farley, David J Baylink;
   Loma Linda, California, USA ... 48-49

Trends in the Prevalence of Dental Fluorosis in the United States: A Review
  Susan M Szpunar, Brian A Burt;
  Ann Arbor, Michigan, USA ... 49-50