If you're looking for IPC SMT Land Pattern Specs consult IPC-SM-782A.
IPC is located at:
2215 Sanders Road
Northbrook, IL 60062-6135
Phone: 847/509-9700
FAX: 847/509-9798
Internet: www.ipc.org
Another useful reference is Vern Solberg's "Design Guidelines for Surface Mount and Fine-Pitch Technology", Second Edition (McGraw-Hill, 1996). I obtained my copy through SMTA.
SMTA
5200 Willson Road, Suite 215
Edina, MN 55424-1338
Phone: 612/920-7682
FAX: 612/926-1819
Internet: www.smta.org
Hope this helps,
Erik Olson
Westell, Inc.