The 24-dimensional odd unimodular lattices. 
Richard Borcherds
Sphere packings, lattices, and groups, by J.H. Conway and N. J. A. Sloane , 
chapter 17 (p. 421-430.) 
(This does not include the table of such lattices, which can be extracted 
from table -4 of "The Leech lattice and other lattices". )