doi: leave url for US, because the doi does not work

Author: sbgraves237

man/nuclearWeaponStates.Rd

@@ -226,9 +226,9 @@
 
   US from \href{https://www.tandfonline.com/doi/pdf/10.1080/00963402.2018.1438219}{Hans M. Kristensen & Robert S. Norris (2018) United States nuclear forces,2018, Bulletin of the Atomic Scientists, 74:2, 120-131}, \doi{DOI: 10.1080/00963402.2018.143821}
 
-  Russia from \href{https://www.tandfonline.com/doi/pdf/10.1080/00963402.2019.1580891}{Hans M. Kristensen & Matt Korda (2019) Russian nuclear forces, 2019, Bulletin of the Atomic Scientists, 75:2, 73-84}, \doi{10.1080/00963402.2019.1580891}
+  Russia from Hans M. Kristensen & Matt Korda (2019) Russian nuclear forces, 2019, Bulletin of the Atomic Scientists, 75:2, 73-84}, \doi{10.1080/00963402.2019.1580891}
 
-  UK from \href{https://journals.sagepub.com/doi/pdf/10.1177/0096340213493260}{Robert S. Norris and Hans M. Kristensen (2013) The British nuclear stockpile, 1953-2013, Bulletin of the Atomic Scientists, 69:4, 69-75s}, \doi{10.1177/0096340213493260}
+  UK from Robert S. Norris and Hans M. Kristensen (2013) The British nuclear stockpile, 1953-2013, Bulletin of the Atomic Scientists, 69:4, 69-75s}, \doi{10.1177/0096340213493260}
 
   France from Robert S. Norris & Hans M. Kristensen (2008) French nuclear forces, 2008, Bulletin of the Atomic Scientists, 64:4, 52-54, 57, \doi{10.2968/064004012}