Literature review

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.

8940

total references

8928

tagged

12

untagged

Browse Search Visualize

References by year:

Tagtree

Literature searches & imports

Title	Source	References	Created	Last Updated
Auto-import at 2020-04-01 13:55:47 Automatically imported by ICF at 2020-04-01 13:55:47	Import: HERO	8940 100% tagged	April 1, 2020, 1:55 p.m.	April 1, 2020, 1:55 p.m.

Manually added references

References manually added: 0