Not so "complete", but...

A somewhat carefully made edition, with texts in russian and translated to english and french. Rachmaninoff's songs are of unsurpassed beauty and richness; This "lieds" recquires special skills for the performers; the piano parts are not mere accompanyments, but complex and and difficult in essence. The problem is, although the title of this book says "complete", it is not: some songs, which don't have specific opus numbers, are not in this compilation. The maximum rate is given only because it's... Rachmaninoff.