X, Malcolm, 1925-1965. -- Drama. : Malcolm X / Warner Bros. presents in association with Largo International N.V. ; a 40 Acres and a Mule Filmworks production ; produced by Marvin Worth and Spike Lee ; screenplay by Arnold Perl and Spike Lee ; directed by Spike Lee.
X-Men (Fictitious characters) -- Drama. : Deadpool / Twentieth Century Fox presents ; in association with Marvel Entertainment ; directed by Tim Miller ; written by Rhett Reese & Paul Wernick ; produced by Simon Kinberg, Ryan Reynolds, Lauren Shuler Donner ; a Kinberg Genre/The Donners' Company production ; in association with TSG Entertainment.
X-ray astronomy -- Interactive multimedia. : Imagine the universe! / prepared by Laura A. Whitlock ... [and others] ; produced by the High Energy Astrophysics Science Archive Research Center at NASA/Goddard Space Flight Center.
X-ray spectroscopy -- International cooperation. : Space cooperation : X-Ray Astronomy Satellite (ASTRO-H) Project : agreement between the United States of America and Japan, effected by exchange of notes at Washington, October 8, 2013, with memorandum of understanding.
X-rays -- Diffraction -- Congresses. : X-ray and related techniques : selected, peer reviewed papers from the International Conference on X-ray and Related Techniques in Research and Industry (IXCRI 2010) held at Langkawi Island, Malaysia from 9th to 10th of June 2010 / edited by Zainal Arifin Ahmad [and others].