Series of questions that will help you determine if you can use a picture and the terms, laws and ethics around using that image.
Add IAP (Images for Academic Publishing) to your search in ARTstor
Images posted openly on the web are not necessarily the public domain.
To find reusable images:
Use Creative Commons -- enter Search term under "Find Licensed Content"
Copyright laws for images : Copyrightlaws.com was initially registered as a domain name in 1998 by Lesley Ellen Harris. It has since been a portal for copyright and licensing information for creators, owners, distributors, and consumers of copyright-protected materials.
Section 108 of the US Copyright Code: Handy spinning wheel chart for libraries and archives regarding section 108 of the US Copyright code.
"Professor Eric Faden of Bucknell University created a humorous, yet informative, review of copyright principles delivered through the words of Disney characters -- an ironic bit of commentary given Disney's key role in lengthening copyright terms."
The video is is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.
Ch. 1: Copyright definition
Ch. 2: What things can be copyrighted (2:50)
Ch. 3: Copyright duration and the public domain (3:45)
Ch. 4: Fair Use (6:20)
Ch. 5: Why use Disney cartoons? (8:10)