Becker, W and G Contopoulos: books & textbook
The Spiral Structure of Our Galaxy.
Becker, W and G Contopoulos: Becker, W and G Contopoulos:
Dordrecht: Reidel 1970. (International Astronomical Union Symposia) /1970T Hardcover
The Spiral Structure of Our Galaxy (International Astronomical Union Symposia)
Springer /2011-11-06 Paperback / 486 Pages
isbn-10: 9401032777 / isbn-13: 9789401032773
