Looking for IBM PC/XT/AT technical references

Hello all, My latest "refocusing" of the collection is on IBM PC hardware (PC/XT/AT, original IBM cards, peripherals, etc.) and on software IBM sold for the PC line. In line with this, I'm also very interested in any technical manuals IBM produced. So far my meager technical manual collection is: 1. Guide to operations (PC, XT, AT) 2. Technical Reference (XT, AT) 3. Hardware Maintenance and Service (XT, AT) All of the above are originals, and the AT Maintenance set includes diagnostics from 1.01 to 1.05 along with loopback testers, and what looks like a 10-BASE2 terminator (or maybe Arcnet??). I'd like to get: 1. Technical Reference (PC) 2. Hardware Maintenance and Service (PC) Original, copies, or scans will do ... Also, I'm wondering what other technical manuals exist. I know there is an "options and adapters" series, but what else is there? Oh, and if anyone is junking a PC-1 (black power supply, 16-64KB motherboard), I'll take it :-) Thanks for pointers, Rich B.