US National Archives
Our Documents: Tonkin Gulf Resolution (1964)
Offers a summary of this resolution which supported President Johnson's actions in Vietnam and also provides an easy to read version of the complete text.
Yale University
The Tonkin Gulf Incident; 1964
A part of the Yale Avalon Project, this page provides the message from President Johnson to Congress the day after the incident and the joint resolution of Congress on August 7, 1964.
Other
The Vietnam Project: Relevance of Tonkin Gulf Incidents
An academic analysis of the declassified record of events in the Tonkin Gulf Incidents. Concludes that the record does not justify the resolution that followed.