The law of wills and estate administration is primarily statutory. It is important to find the statute from the proper jurisdiction.
Free Resource to locate State Law: Cornell University Law School - Legal Information Institute has a topical index of state statutes. Scroll down and click on Probate, and you will find links to state statutes.
Public Findlaw: Go to the Estate Planning page to find links to planning an estate, probate, wills and trusts and more. There are forms available for free and for purchase. Click on "State Laws: Estates & Probate" to find links and citations to estate and probate laws of all 50 states and the District of Columbia. There are also forms available for free and links for forms available to purchase
Westlaw: Database (SURVEYS) - This database provides access to state and federal statutes and provides references to applicable state laws. It is based on National Surveys of State Laws, 6th Edition.
Lexis: File-Name (SURVEY) - Each survey contains links to relevant codes and regulations on a particular topic.