Several poems by Li Po are included in the 1975 Anchor Press anthology Sunflower Splendor: 3000 Years of Chinese Poetry, which provides an excellent introduction to Chinese poetry supplemented by helpful explanatory materials.
Ezra Pound noted that "The River-Merchant's Wife" had a style and tone that would make it seem at home in Robert Browning's early collection of poetry titled Men and Women, available from Oxford University Press, 1972.
In Digging for the Treasure: Translation after Pound, published by Peter Lang in 1984, Ronnie Apter discusses Pound's ability to remain faithful to the original poem while translating for a twentieth-century reader.
Cathay is included in Pound's Collected Shorter Poems (Faber & Faber, 1968), a volume that includes many of Pound more accessible works.
Simon Elegant's A Floating Life: the Adventures of Li Po: an Historical Novel is a beautifully written tale that recreates the adventurous, flamboyant life of Li Po, describing his role in the golden age of Chinese culture.
The Case of Ezra Pound presents documentary evidence, testimony, and the response of many contemporary poets to the trial of Ezra Pound. This fascinating study was edited by Charles Norman and was published by Funk & Wagnells in 1968.
James Laughlin's 1985 work Pound as Wuz: Essays and Lectures on Ezra Pound is a collection of insightful, frequently touching memories based on Laughlin's relationship with Pound in the years before World War II.
Van Wyck Brooks discusses the influence of Oriental art and philosophy on Western artists in Fenollosa and his Circle, a biography of the man upon whose preliminary work Cathay is based.
Published by Oxford University Press in 1999, Ezra and Dorothy Pound: Letters in Captivity, 1945-46 presents an fascinating picture of their relationship, along with a chilling picture of his captivity.