1. Low frequency observations of emission nebulae and their electron temperatures

   • Yervant Terzian

   OriginalPaper Pages: 479 - 489

2. The department of defense Selenodetic Control System and the force function of the moon

   • C. L. Goudas
   • T. P. Higgins

   OriginalPaper Pages: 490 - 517

3. An investigation on H-R diagrams of globular clusters

   • V. Castellani
   • P. Giannone
   • A. Renzini

   OriginalPaper Pages: 518 - 529

4. On old universes and galaxy evolution

   • R. H. Chambers
   • R. C. Roeder

   OriginalPaper Pages: 530 - 541

5. Heavy-element abundances in peculiar a stars

   • B. N. G. Guthrie

   OriginalPaper Pages: 542 - 551

6. Convection in normal stars and metal-deficient stars

   • K. S. Krishna Swamy

   OriginalPaper Pages: 552 - 563

7. Large-scale evolution of the lunar surface

   • Luciano B. Ronca
   • Richard R. Green

   OriginalPaper Pages: 564 - 578

8. Equilibrium spectra of secondary cosmic-ray positrons in the galaxy and the spectrum of cosmic gamma-rays resulting from their annihilation

   • F. W. Stecker

   OriginalPaper Pages: 579 - 599

9. The variations of the electron density within M8

   • J. Meaburn

   OriginalPaper Pages: 600 - 614

10. Abstracts of forthcoming papers

    Abstract Pages: 615 - 616