Titles from Henry IV, Part 1 - A listing of book and play titles taken from Henry IV, Part 1. - http://www.barbarapaul.com/shake/1henryiv.html
The First Part of King Henry IV - University of Virginia's electronic text center. - http://etext.lib.virginia.edu/toc/modeng/public/Mob1He4.html
William Shakespeare info: Henry IV (Part 1) - Full text, plot summary, first performances, printing dates, and quotes. - http://www.william-shakespeare.info/shakespeare-play-king-henry-iv-part-1.htm
Literature Network: King Henry IV, Part 1 - Scene-indexed HTML of the complete text. Summary, search feature, and author information. - http://www.online-literature.com/shakespeare/henryIV1/