@book{Blackstone59, Address = {London}, Author = {Blackstone, William}, Date-Added = {2017-03-15 11:58:40 +0000}, Date-Modified = {2017-03-15 11:59:24 +0000}, Publisher = {Cavendish Publishing}, Title = {{Commentaries on the Laws of England}}, Volume = {1-4}, Origdate = {1765-9}, Year = {2001}}
Invalid format "1765-9"