Schmiedeler, Edgar. Christian Marriage: An Analysis of and Commentary on the Marriage Encyclical. Sixth Edition. Washington, DC: National Catholic Conference on Family Life, 1948. lacks the milestones to link is to the source document.
Perhaps I'm missing something but I don't see any explicit milestone indicators that could be used to link with Casti connubii. Did you have something particular in mind?
oops - you are correct that this would require significant analysis. Not your job - nor should it be.