One of the best places to start your search. Includes criticism on poems of 1000 lines or less. Sources include books and journal articles. Arranged alphabetically by poet. Present A source for criticism on major poems of British and American authors.
References are primarily to journal articles.
Arranged alphabetically by poet and poem title. An important source. Up to date through 1978. Arranged by name of poet and then by poem title. 1900 - 1950 Similar to the others, but this one contains annotations.