An encyclopedic work on the subject at 600 pages. The book is in Very Good condition but with ex libris marks. An early work on the subject and with Penrose and Sciama as contributors.
@riseup.netAn encyclopedic work on the subject at 600 pages. The book is in Very Good condition but with ex libris marks. An early work on the subject and with Penrose and Sciama as contributors.