Knudson, R. Rozanne, The Wonderful Pen of May Swenson, Macmillan, 1993.

This is a biography of May Swenson written by her
longtime friend R. R. Knudson. It contains excerpts
from her poems and photographs from her personal
collection. Although written by an obvious supporter
of her poetry, the book presents a candid, honest picture
of the poet's life.

Swenson, May, Dear Elizabeth: Five Poems and Three Letters to Elizabeth Bishop, Utah State University Press, 2000.

Just as the title suggests, this collection of personal
letters and poems dedicated to Swenson's friend,
mentor, and fellow poet Elizabeth Bishop was published
through the Literary Estate of May Swenson.
It contains copies of actual letters in Swenson's own
handwriting and exposes some of her deepest
thoughts about a woman she cared deeply for.

—, Iconographs, Scribner, 1970.

Swenson used the word "iconograph" to refer to her
"shape" poems—works that typographically and visually...