This premier manual incorporates all state and federal laws governing the exploration and collection of specimens on public lands as a hobby, business or profession. Authored by Donald Wolberg and Patsy Reinard in 1997. We can assume that many of these ‘rules and regulations’ have been changed when politicians are replaced…..an interesting read and try to figure out how some of these things are justified. Saw a listing on Amazon for this book for over $900 – did I miss something????? Lots of information state by state – Dona