developer's guide?

Hi hackers:

I plan to do some research on indexing and concurrency control, and
implement 
the algorithms into PostgreSQL. Do some comparison on them.

Would anyone suggest me where I should go into first?

I saw there should be a developer's guide out there, but I looked all over
the web and
could not find it. Please point me the direction. Thank you.

Jack Ho
========================================
University of Oklahoma
School of Computer Science

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