Skip to main content
Banner Image


While the library doors are temporarily closed to the public, our vast online resources remain available. You can email or chat with a librarian from 9 am to 12:30 pm, and 1:00 pm to 4:30 pm Monday-Friday or search our FAQ’s after hours. You can also email our Circulation Desk at or Reference Desk at to reach us.

For a quick way into our resources, see our guide Accessing Library Resources: Off Campus / Remotely: Remote Learning.

ENVS 100 - Integrated Environmental Studies

Introductory Environmental Studies class - Dr. Tom Henshaw

Starting Points to Find and Explore Topics

Primary vs Secondary Sources

Types of Sources

Primary Source Secondary Source

Reports original research

Reports and analyzes previous results without adding new data

Results of experiments

Editorializes on information from previously published paper

Reports on new discovery

Interprets previous study

Results of clinical trials



Primary Source Secondary Source

Published results of an experiment or clinical trial

News article reporting on an experiment

Published results of a research study or natural observation

Review of a series of articles on a given topic

Proceedings of a Conference or Meeting

Editorial article

Policy or Law from a government entity

Law review article explaining case law

Denison Libraries, 100 W College, Granville, Ohio 43023
Phone: 740-587-6235, email:
In order to view PDF documents, you will need to have the free Adobe Acrobat Reader software installed on your computer