Help needed

Hello all

I new here, so my question might be out of order, but here goes anyway.

After getting hold of some old D&D 3.0 ed, Mongoose Publishing material, namely Encyclopaedia Arcane (Abjuration), I read in this book, a feat called School Focus (abjuration). I have tried to find the discription of this feat online and in other mongoose producs I have, but without luck. Can anyone tell me where I can find this feat and/or what it does???

PS. I Can tell you, that the feat Spell Focus is also mentioned in this book, so one could assume that they did different things.

PPS. I dont think this is the same feat as the one from Complete Mage called Meta-Magic School Focus

Thanks

Nicolai Withander