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From: gwyn@smoke.brl.mil (Doug Gwyn)
Newsgroups: comp.sys.apple2
Subject: Re: Can anyone help me find...
Message-ID: <14685@smoke.brl.mil>
Date: 7 Dec 90 19:58:04 GMT
References: <1990Dec6.223240.8536@world.std.com>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 8

In article <1990Dec6.223240.8536@world.std.com> jeffb@world.std.com (Jeffrey T Berntsen) writes:
>3. (Don't know how hard): I'm looking for a disk (set of disks?) called
>   DOSOURCE 3.3.  This contained (or produced?) a commented disassembly of
>   DOS 3.3.  I don't know who published it originally and anyone I've talked
>   to recently doesn't know what I'm talking about.

Sounds like Sandy Mossberg's collected columns from Nibble (I think it was).
Check an issue of Nibble, which is half ads for Nibble stuff anyway.