Joomla 3.1.5 - Where is the language file for the com_contact

Hello

Using Joomla 1.3.5  I am trying to modify the label (English) for some of the contact field labels.

I would assume the language file is in the  /language/en-GB folder, and most likely en-GB.com_contact.ini

However, when  I look inside that file I don't find "Telephone"  (I do find "Phone").  I also don't find "City or Suburb"  or "Postal / ZIP Code'   -- all of which are in the core English contact details form.

Any ideal where I can find it.   It's for adding new contacts in Joomla's core contact manager.

Thanks!

Rowby