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: HOLLISTo: 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: