50-state surveys are compilations of statutes, regulations, or other sources of law from multiple jurisdictions on a particular topic. They can be an excellent starting point when you are trying to find the law from one or several jurisdictions related to a topic in which you are interested. They can also help you identify the law(s) you need if you are unsure of the terminology commonly used.
There are a variety of available sources. Please be aware of any potential biases and gaps that may exist in these surveys. If you locate a 50-state survey on your particular topic of interest, make sure to check it for accuracy and currency.