Your zielona Gora can be found on kartenmeister. Go to Kartenmeister.com, scroll to the bottom of the first screen and enter zielona gora in the polish city name field.It will show you that it wa formerly Grunberg and that it then covered three counties.For family search in Schlesien go to Rootsweb.com ,Mailing Lists,Cental Europe to the DEU-SCHLESIEN list with your request. There is a wealth of information there and people willing to help.