You can on the command line, yes.
As always, grep is your friend:
$ cd ~Source/Books/Beginning iOS 6 Development/ch04/Control Fun/Control Fun/en.lproj $ grep png * BIDViewController.xib: <string key="NSResourceName">apress_logo.png</string> BIDViewController.xib: <string key="NS.key.0">apress_logo.png</string>
trojanfoe
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