Webster states that the four main poets discussed in this book, that was originally a doctural thesis, were not influenced by Mallarme's Un Coup de Des. In the case of Marinetti, he points out the structural typographic differences and similarities between Un Coup de Des and Parole In Liberta. Webster uses the term, visual poetry, as synonymous with concrete poetry. An appendix depicts several poems descibed in the book. -- Source of annotation: Marvin or Ruth Sackner.