Complex sentence: Reinvigorated by a change in leadership and New Deal dollars in the 1930s, the entire collection was re-inventoried and re-cataloged, and indexes to archival and local periodical collections were developed.
Split into simpler sentences: Reinvigorated by a change in leadership and New Deal dollars in the 1930s, the entire collection was re-inventoried and re-cataloged. Additionally, indexes to archival and local periodical collections were developed.