I have been looking for this paper in a standalone version! Previously I've only come across it as the first chapter of The Kelly Capital Growth Criterion, which is an otherwise also excellent book and recommended reading for anyone for whom this is their thing!
I read the two first or so papers of the book and understood them, but I coulnd't get past because I lack the sufficient probability theory (I'm a functional analyst). Now it's been in my queue for some time but I hope to get to it after finishing the references I'm reading now.