Index: /trunk/doc/release.2015/inputs/lib.bib
===================================================================
--- /trunk/doc/release.2015/inputs/lib.bib	(revision 40065)
+++ /trunk/doc/release.2015/inputs/lib.bib	(revision 40066)
@@ -1,2 +1,9 @@
+                  
+% duplicate \cite values:
+% 2004SPIE.5489..667H == PS1.optics
+% 2008SPIE.7014E..0DO == PS1.GPCB
+% 2009amos.confE..40T == PS1.GPCA
+% 2012ApJ...756..158S == ubercal
+
 @ARTICLE{chambers2017,
    author = {{Chambers}, K.~C. and {Magnier}, E.~A. and {Metcalfe}, N. and et al.},
@@ -13,5 +20,5 @@
 }
 
-@ARTICLE{magnier2017a,
+@ARTICLE{magnier2017.calibration,
    author = {{Magnier}, E.~A. and {Schlafly}, E.~F. and {Finkbeiner}, D.~P. and 
 	{Tonry}, J.~L. and {Goldman}, B. and {R{\"o}ser}, S. and {Schilbach}, E. and 
@@ -52,5 +59,5 @@
 }
                   
-@ARTICLE{magnier2017b,
+@ARTICLE{magnier2017.analysis,
    author = {{Magnier}, E.~A. and {Sweeney}, W.~E. and {Chambers}, K.~C. and 
 	{Flewelling}, H.~A. and {Huber}, M.~E. and {Price}, P.~A. and 
@@ -70,5 +77,5 @@
 }
 
-@ARTICLE{magnier2017c,
+@ARTICLE{magnier2017.datasystem,
    author = {{Magnier}, E.~A. and {Schlafly}, E.~F. and {Finkbeiner}, D.~P. and et al.},
     title = "{IPP}",
@@ -609,4 +616,5 @@
 }
 
+% sometimes we use PS1.optics,                   
 @INPROCEEDINGS{2004SPIE.5489..667H,
    author = {{Hodapp}, K.~W. and {Siegmund}, W.~A. and {Kaiser}, N. and {Chambers}, K.~C. and 
@@ -3965,4 +3973,5 @@
 }
 
+% ubercal                  
 @ARTICLE{2012ApJ...756..158S,
    author = {{Schlafly}, E.~F. and {Finkbeiner}, D.~P. and {Juri{\'c}}, M. and