Robert Creeley Obituary
https://www.nytimes.com/2005/04/01/books/robert-creeley-78-groundbreaking-poet-dies.html
This obituary from the New York Times provides a wide-ranging look back at Creeley's long career, including various highlights and notes on the development of his work.
Creeley Reads Creeley
https://www.writing.upenn.edu/pennsound/x/Creeley.php
This page is University of Pennsylvania's compendium of audio recordings from Creeley's various readings. Hearing him recite his own work gives insight into the subtle rhythms embedded in his lines.