Introductory book on cosmology from the early 70s or late 60s.

The word "Cosmology" was not in the title, but the preface said the book was meant to be used for an introductory course in cosmology. There were about 10 self-contained chapters, covering diverse topics such as archaeological dating with dendrochronology, and the formation of planets and ourselves from chemical elements created in supernovas. I stumbled onto this fascinating book in my college library in 1975 and wish I could find it again.

/edit: some more I remember about this book:

The chapter on supernovas tells the history of star formation, and how the first generation of stars that formed after the Big Bang had no planets, because the universe contained only hydrogen and helium. Supernovas gradually created enough heavier elements that stellar systems were able to form with planets.

I believe there is also a chapter about the 3-degree cosmic background radiation, which at that time was a fairly new subject.