Very few Green County marriages are online at present. I don't know if you have checked with the Greene County Clerk's office for a marriage license. The Clerk's office may be able to find the record under the groom's name. According to the link below, the office accepts mail requests for searches.http://www.co.greene.pa.us/secured/gc2/depts/lo/COC/coc.htm
I did a first name only search for Delores in Greene County for the 1940 census.
This is the only record, Delores Pokos, that I found that comes close to her age:https://familysearch.org/pal:/MM9.1.1/KQQT-JSM
It is interesting that there is a Wilson family living next to them.
I then searched for this Delores Pokus in the 1930 census. I could not locate her, but I believe this is the same Jacob and Elizabeth in 1930 spelled Pohos:https://familysearch.org/pal:/MM9.1.1/XH3C-16V
(Borders changed and Yugoslavia was formed from part of the Austro-Hungarian Empire.)
Here is the husband and wife at FindaGravehttp://www.findagrave.com/cgi-bin/fg.cgi?page=gsr&GSfn=&...