The Philo Index: A Helpful Work for Philo Scholars

Check out The Philo Index: A Complete Greek Word Index to the Writings of Philo of Alexandria by Peder
Borgen (et al.). You can find out more about the book here:

http://www.amazon.com/exec/obidos/tg/detail/-/0802838839/qid=1079054363/sr=1-4/ref=sr_1_4/104-1479853-4204769?v=glance&s=books