Neem is "Azadirachta indica" A. Juss (Meliaceae).
I am mailing to you the 140-page report "Neem: A Tree For Solving Global
Problems" (1992) from the National Research Council, National Academy
Press, Washington, DC, plus some reprints from our lab. For additional
information, contact Deepak Bhatnagar of our lab at
dbhatnag at nola.srrc.usda.gov.