Hello, andrewfgray!
Here are some sources:
http://ruspalomnik.me/srpski/SERBIAN_eng.PDF
http://seelrc.org:8080/grammar/pdf/stand_alone_bcs.pdf
https://docs.google.com/file/d/0BzEbzAC6e6SGb0dIMDFMZmhfU2M/edit?pli=1
http://www.studyserbian.com/proba/Home/Index.asp
http://slovce.blogspot.com/p/english-engleski.html
Good luck!