You need to locate a name of a town in order to proceed with the research. Where have you looked?If your ancestor had social security numbers or was naturalized citizen than those forms would have that information. http://ssdi.rootsweb.comhttp://ssdi.rootsweb.com www.nara.gov www.rat.de/kuijsten/navigator
There were 3 BURKOVICs that passed thru Ellis Island. Take a look at the manifests.