add SEES-branded periodic table

doc/periodictable.rst

@@ -12,6 +12,10 @@ X-ray Periodic Table of the Elements
 .. _Curie (Medium):     https://docs.xrayabsorption.org/XrayTable/xray_table_36in_Curie.pdf
 .. _Mendeleev (Medium): https://docs.xrayabsorption.org/XrayTable/xray_table_36in_Mendeleev.pdf
 .. _Moseley (Medium):   https://docs.xrayabsorption.org/XrayTable/xray_table_36in_Moseley.pdf
+.. _SEES (Large):       https://seescience.org/wp-content/uploads/2024/09/SEES_periodic_table_large.pdf
+.. _SEES (Medium):      https://seescience.org/wp-content/uploads/2024/09/SEES_periodic_table_medium.pdf
+
+.. _SEES:               https://seescience.org/
 .. _Charles Barkla:     https://en.wikipedia.org/wiki/Charles_Glover_Barkla
 .. _Marie Curie:        https://en.wikipedia.org/wiki/Marie_Curie
 .. _Dmitri Mendeleev:   https://en.wikipedia.org/wiki/Dmitri_Mendeleev
@@ -23,7 +27,7 @@ are built using latex and the Python code and Makefile in `poster folder`_.
 
 There is a choice of two sizes, and a choice of an image of one of four
 prominent scientists associated with the Periodic Table and X-ray
-spectroscopies.
+spectroscopies, or with `SEES`_, the group supporting this work.
 
 .. index:: X-ray Periodic Tables
 .. _periodic_table:
@@ -42,6 +46,8 @@ Large is 127.5x61 cm (about 50x24 inches) and Medium is 91x45.5 cm (about 36x17
     +----------------------+------------------------+------------------------+
     | `Henry Moseley`_     | `Moseley (Large)`_     | `Moseley (Medium)`_    |
     +----------------------+------------------------+------------------------+
+    | `SEES`_              | `SEES (Large)`_        | `SEES (Medium)`_       |
+    +----------------------+------------------------+------------------------+
 
 These periodic tables will look like this: