Failed to get "bodies of work" here. What does it mean?

In the face of it, I seem to understand it. And then I ponder it and find it elusive.
Does "body" here refer to "the central message of a text/article"?

Context:

AS: The first one has to do with the vacuum. The lowest energy thing is the vacuum. And it’s always been assumed that the vacuum in quantum gravity or in quantum electrodynamics is unique—that there’s only one zero-energy state. And what I’ve shown in the last couple of years is that that assumption is wrong. There are in fact infinitely many different vacuum states. In a way, what I showed was implicit in things that other people had said. It all started out by showing this equivalence of two different bodies of work that were done in the 1960s by Steve Weinberg and by Bondi, van der Burg, Metzner and Sachs.

More:
http://blogs.scientificamerican.com/dark-star-diaries/stephen-hawking-s-new-black-hole-paper-translated-an-interview-with-co-author-andrew-strominger/