Some websites for your research which you might have or not.
A map of Austria-Hungary http://users.erols.com/mwhite28/austhung.htmwww.rat.de/kuijsten/navigator
Austria's phone site : www.herold.atwww.croatia-in-english.comhttp://imenik.t-com.hr
Croatia's phone sitewww.genealogienetz.de/reg/ESE/dsinfo.htm
Just out of curiosity, take a look in Ellis Island website. You need to register but no money is involved. There were 11 SPASOJEVICs.
Germany's phone book is listing STREISEL.www.dastelefonbuch.de