1. Editorial

   EditorialNotes Pages: 515 - 515

2. Localization of recently characterized membrane transport adenosine triphosphatases

   • J. Anthony Firth
   • Geoffrey J. Stranks

   Reviews and Papers Pages: 517 - 524

3. 5-Nucleotidase activity in lymphocytes

   • Risto J. Uusitalo

   Reviews and Papers Pages: 525 - 534

4. β-Hydroxysterol distribution as determined by freeze-fracture cytochemistry

   • Daniel S. Friend
   • Elaine L. Bearer

   Reviews and Papers Pages: 535 - 546

5. Cytochemical evidence for the segregation of adenylate cyclase, Ca²⁺-, Mg²⁺-ATPase, K⁺-dependentp-nitrophenyl phosphatase in separate membrane compartments in human platelets

   • L. S. Cutler
   • M. B. Feinstein
   • C. P. Christian

   Reviews and Papers Pages: 547 - 554

6. Immunocytochemical localization of GABAergic neurones at the electron microscopical level

   • Charles E. Ribak
   • James E. Vaughn
   • Roeert P. Barber

   Reviews and Papers Pages: 555 - 582

7. Recent developments in aldehyde-induced monoamine fluorescence: The aluminum-formaldehyde (ALFA) method applied to immature and adult central nervous tissue

   • Olle Lindvall
   • Anders Björklund
   • Ingemar Lorén

   Reviews and Papers Pages: 583 - 598

8. Intracellular and extracellular control of the differentiation of cartilage and bone

   • Brain K. Hall

   Reviews and Papers Pages: 599 - 614

9. Golgi orientation and cell behaviour in the developing pattern of chondrogenic condensations in chick limb-bud mesenchyme

   • D. A. Ede
   • O. K. Wilby

   Reviews and Papers Pages: 615 - 630

10. Neural crest cells and skeletogenesis in vertebrate embryos

    • Peter Thorogood

    Reviews and Papers Pages: 631 - 642

11. The role of the zone of polarizing activity in controlling the differentiation of the apical mesenchyme of the chick wing-bud: histochemical thechniques in the analysis of a developmental problem

    • J. F. Hinchliffe
    • J. A. Garcia-Porrero
    • M. Gumpel-Pinol

    Reviews and Papers Pages: 643 - 658

12. Cell death: questions for histochemists concerning the causes of the various cytological changes

    • Richard A. Lockshin
    • Jacques Beaulaton

    Reviews and Papers Pages: 659 - 666

13. Induced cell injury and cell death as a cause of congenital malformations in rats

    • F. Beck

    Reviews and Papers Pages: 667 - 679

14. Chromatin changes in apoptosis

    • A. H. Wyllie
    • G. J. Beattie
    • A. D. Hargreaves

    Reviews and Papers Pages: 681 - 692

15. News and views

    • B. D. Lake

    News Pages: 693 - 694

16. Osmiophilic reagents in electron microscopic histochemistry progress in histochemistry and cytochemistry, Vol. 1, no. 1

    • H. D. Fahimi

    Book Review Pages: 695 - 696