Harvard's online catalog is a perennially useful tool, both because of its size and its searching and exporting features. I chose to have the HOLLIS records e-mailed to me in a form designed for further processing by bibliographic software (ProCite, etc.), though I used FoxPro for the sorting tasks.

Here's what a HOLLIS record looks like:

From LIBRARY@HARVARDA.HARVARD.EDUSun Dec 10 09:37:16 1995
Date: Sun, 10 DEC 95 09:37:02
From: HOLLIS 
To: HBLACKME@liberty.uc.wlu.edu
Subject: Record Set# 1304

%START:
%HOLLIS#: HU ANY1688
%FORMAT: bks
%YEAR: 1843
%AUTHOR: Berzelius, Jons Jakob, friherre, 1779-1848.
%TITLE: Lehrbuch der chemie,
%EDITION: 5. umgearb. original-aufl.
%PUB. INFO: Dresden, Leipzig, Arnold, 1843-48.
%PUBLISHED IN:
%DESCRIPTION: 5 v. plates (part fold.) tables. 22 cm.
%SUMMARY:
%SERIES:
%FREQUENCY:
%NOTES:
%NUMBERS:
%SUBJECTS: Chemistry.
%AUTHORS: Berzelius, Jons Jakob, friherre, 1779-1848.
%LOCATION: Countway Medicine:  Rare Books 36.H.1843.1.  Library has: 5 v.
\Widener:  Chem 428.43  Library has: 5 v.
%END: