Home › Authors › Murray Marshall 👤 Murray Marshall 5 books Books by Murray Marshall Positive polynomials and sums of squares 2008 Valuation theory and its applications 2002 Handbook of Free Careers Infor Handbook of Free Careers Information 1993 Bilinear forms and orderings o Bilinear forms and orderings on commutative rings 1985 Abstract Witt rings Abstract Witt rings 1980