William Carlos Williams
https://www.poetryfoundation.org/poets/william-carlos-williams
This is a deeper dive into the biography of Williams, analyzing the influence of his life on his writing.
William Carlos Williams, The Art of Poetry No. 6
https://www.theparisreview.org/interviews/4486/the-art-of-poetry-no-6-william-carlos-williams
This is an interview by the Paris Review of William Carlos Williams in 1962, not long before his death.
Modern Poetry
https://oyc.yale.edu/english/engl-310
This is a free Yale course that provides an in-depth look into Modernist poetry, including major writers, its relationship to history and other cultural movements, and its...