Sylvia, the J.W. Pepper music companycarries the full orchestra arrangement of this piece by Merle Isaac. You could either call them at 1-800-345-6296, or look at the first page of the score online, which shows no harp, only piano. I read that balalaikas were included in The Red Poppy, the ballet from which this dance came, and perhaps they were not in this particular Sailor’s Dance. In any case here is the link to view that score, first page only:
http://www.jwpepper.com/sheet-music/pdfviewer.jsp?prodnum=0261271&pf=I_261271