January 2023 Content Update Secondary School Core


5 new titles were added to Secondary School Core and Secondary School Core with Backfile on January 11, 2023.

Curated Secondary School Core Title Removal

We did our yearly title weed from the curated version* of Secondary School Core. These are the three "Backfile" titles that have been removed:

  • A Dictionary of Philosophy, Macmillan
  • Macmillan Dictionary of the Bible
  • Reader’s Guide to the Social Sciences, Routledge/T&F

You can download a set of MARC purge records by clicking this link. Learn more about the Backfile weeding process here, or email support@credoreference.com with any questions.

Secondary School Core with Backfile Title Retirements

We retired four titles from Secondary School Core with Backfile. (These titles were previously removed from the curated version of Secondary School Core, so this does not affect subscribers with this package.) MARC purge records can be downloaded by clicking this link. These are the four retired titles:

  • Marquis Who's Who in America
  • Marquis Who's Who in the World
  • Marquis Who Was Who in America 1607-1984
  • Marquis Who Was Who in America 1985-present

There are now 1037 titles in the Secondary School Core collection, and 1258 titles in Secondary School Core with Backfile. If you subscribe to one of these packages, see a full title list in your Admin account (log-in required), or check it out on our corporate site: Secondary School Core, Secondary School Core with Backfile.


New Secondary School Core Titles:


A Concise Dictionary of Paleontology

ISBN: 9783030255855

This unique English language dictionary of paleontological terms, taxa, localities, and concepts focuses on the most common orders, genera, and species, paying careful attention to overall historical significance in terms of turning points such as mass extinctions.


Encyclopedia of Ancient Deities

ISBN: 9781476685564

This exhaustive reference covers the known ancient gods, many heretofore obscure or known only from mythological literature, with a focus on their origins, histories, and functions.


Guide to the Manta and Devil Rays of the World

ISBN: 9780995567399

Guide to the Manta and Devil Rays of the World includes detailed information on the identification, characteristics, threats and distribution for each of the species within this family of rays.


Historic Documents of 2017

ISBN: 9781544300702

Historic Documents is renowned for the well-written and informative background, history, and context it provides for each document. Each volume begins with an insightful essay that sets the year's events in context, and each document or group of documents is preceded by a comprehensive introduction that provides background information on the event.


Political Assassins, Terrorists and Related Conspiracies in American History

ISBN: 9781476683935

Providing biographical summaries of more than 100 assassins and terrorists, this book aims at a more complete understanding of the motivations behind violent extremism.


* The curated version of Secondary School Core is the typical package of customers who have joined Credo since 2016, as well as earlier accounts which have opted into the curated Secondary School Core package. Accounts with the legacy “Secondary School Core with Backfile” product are not affected. Please email support@credoreference.com if you have any questions about your subscription package.

If you want these Backfile titles restored to your account, we can switch your subscription package to the non-curated version of Secondary School Core at no extra charge, and with no further paperwork. Just email support@credoreference.com for further help.


There were no updated titles this month. A full list of updated and retired titles is always available upon request to support@credoreference.com.

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