Here are the details from the source:
http://www.ietf.org/rfc/rfc2328.txt?number=2328
LSA's are described in Table 9.
If you're looking for more details, I would suggest the book 'Routing TCP/IP' by Jeff Doyle, published by Cisco Press. Arguably, it's the best book ever written on IGP's.
Hope that helps!
Jeff