You need to get answers to the following (they should be used to the terminology):
Exclusive/Non Exclusive?
Media/Editions: Hardback, Softback, Hardback+Softback
Placement: Front/Back Cover/Internal
Size: Full/half/quarter/eighth page etc
Print Runt to: 100K/250K/500K etc
Duration: 1/2/5/10/15yrs
Regions Licensed: US/US English/US All Languages/World
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Sample license (Adjust to taste

):
Misty Dawn Photography grants xyz Publisher the following rights to use photograph abc:
Exclusive World rights, All Languages; Hard Back, Softback; up to 100,000 copies; 15 year license.
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The answers should help you dictate the fee you charge too. The longer/larger/wider the rights they want, the more they pay. Remember it's always a negotiating game too.
Good Luck.
HTH