"Grey Literature consists of materials that are unpublished or have been published outside of the typical commercial or academic publishing environment."

- CSU Research Guide (linked below)

Typical examples: 

• Conference proceedings (can be found in some library databases) 
• Gov't Reports (can be found in some library databases) 
• Data Sets 
• Newsletters/Trade Publications 

• What other groups or people might be interested in your topic? 
• Who else is interested in the same mission, population, service?

Think about: 

• Professional orgs (like AOTA) 
• Other related professional organizations (AMA)
• Government Organizations (federal, regional, state, local)  
• Non-profits (national, state, local) 

• ​​​​​​Google. You're just going to have to google. And search again and again. 
• Use what you find in your library research to help shape what you might find out on the interwebs 
• Some library databases will also contain gray literature (particularly gov't reports!)