To find legal information on particular subject areas it is ALMOST ALWAYS best to start with a legal encyclopedia. Encyclopedias summarize what courts and laws have said and list specific court cases and statutes in footnotes.
Start with the general index at the end of the encyclopedia. Look up your subject (experiment with different terms). The index gives you a subject chapter name and a section number. To find out what the abbreviations used in the index mean look in the table of abbreviations in the front of any index volume. Look up the chapter name alphabetically in the main volumes of the encyclopedia. Each chapter is divided into numbered sections. There is a detailed outline at the beginning of each chapter and a chapter index at the end of the volume for further help in finding what you want. ALWAYS LOOK IN THE POCKET SUPPLEMENTS to each volume for the latest material.