1. Locating a point on a spherical surface relative to a spherical polygon of arbitrary shape

   • Michael Bevis
   • Jean-Luc Chatelain

   Articles Pages: 811 - 828

2. On tail estimation: An improved method

   • G. R. Dargahi-Noubary

   Articles Pages: 829 - 842

3. Some notes on entropy measures. II. The relative entropy matrix and the positivity constraint

   • Ian Lerche

   Articles Pages: 843 - 852

4. The HMX mixing calculation program

   • D. Stöckelmann
   • W. U. Reimold

   Articles Pages: 853 - 860

5. Numerical model of contaminant transport through conduit-porous matrix system

   • A. G. Bobba

   Articles Pages: 861 - 890

6. Cumulative semivariogram models of regionalized variables

   • Zekâi Sen

   Articles Pages: 891 - 903

7. Statistical estimation of mineral age by K-Ar method

   • A. B. Vistelius
   • E. R. Drubetzkoy
   • A. V. Faas

   Articles Pages: 905 - 919

8. The oldest laboratory of mathematical geology (USSR) and its seminar

   • Andrew B. Vistelius

   Articles Pages: 921 - 932

9. Abstracts of seminars at the Laboratory of Mathematical Geology (1984–1985)

   Abstract Pages: 933 - 946

10. Book reviews

    • Thomas A. Jones
    • C. John Mann
    • Thomas A. Jones

    BookReview Pages: 947 - 955

11. Book review

    • F. P. Agterberg

    BookReview Pages: 957 - 958

12. Editor's note

    • C. John Mann

    Announcement Pages: 959 - 960