1961
The Wondrous Universe [E-Book] : Creation without Creator? /
1962
Wrong for the Right Reasons [E-Book] /
1963
X-Ray Diffraction by Macromolecules [E-Book] /
1964
X-Ray Lasers 2006 [E-Book] : Proceedings of the 10th International Conference /
1965
X-Ray Lasers 2008 [E-Book] /
1966
XIVth International Congress on Mathematical Physics : Lisbon, 28 July - 2 August 2003 [E-Book] /
1967
Zdeněk Kopal's Binary Star Legacy [E-Book] /
1968
Zinc Oxide — A Material for Micro- and Optoelectronic Applications [E-Book] /
1969
Zur Konstruktion künstlicher Gehirne [E-Book] /