Inexplicably, this file does not show up on the web version menu page. There is an array of formats and publication types to use. Beyond the limit placed on choice by dates of coverage and contents, choose resources based on subjective preferences. A few relatively objective comments are offered below. The History section will provide invaluable legislative history citations and sometimes explanations.
Statutory schemes are easier to comprehend in print.
The print resource for session laws, United States Statutes at Large , contains notes in the margins showing where each individual paragraph went into the United States Code , and this graphical presentation is much clearer than trying to find the comparable information viewing a Public Law online. The web is also subject to Internet slow-downs. If the legislation to be researched is prior to 1948, note those print resources below that will be the necessary starting point. Subject index, congressional reports, misc. St. 6, Cab.