I'm sending two files with NGC 3766 data:

--> ngc3766.dat --- the photometry file
it has 2487 lines (stars)

Format: ID Xpixel Ypixel V B-V U-B

For the stars with no U photometry so I 
assigned a value of 99.999 to the U-B color.
The pixel scale is 0.396''/pixel.


--> ngc3766.ci  --- the cross-id file
75 stars

Format: ID V B-V U-B  ID V B-V U-B  ID V B-V U-B   V B-V        V
	------------  ------------  ------------  --------   --------
	  My data	 Ahmed          Sher       Schild    Shobbrook

Where ID is the identification given by each author.
Schild used Ahmed's IDs. 
Shobbrook used Ahmed's and Sher's ID's.

Stars not measured by Sher have IDsher=9999 .
Stars that don't have photometry in some particular color are
flagged as 99.999 in that color.