When is two a crowd? The impact of federal action on state environmental regulation Author Adler J.H. Journal/Series The Harvard Environmental Law Review | Vol. 31(1); 67- 114; 48 p. Date 2007 Source IUCN (ID: ANA-080073) Publisher | Place of publication Harvard Law School | Cambridge, MA, USA Document type Article in periodical Language English Country/Territory United States of America Subject Environment gen. Keyword Policy/planning