Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https://
means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Description included in the dataset. This dataset is associated with the following publication: DeMarini, D., S. Warren, K. Lavrich, A. Flen, J. Aurell, B. Mitchell, D. Greenwell, B. Preston, J....
data.gov
An official website of the GSA's Technology Transformation Services