I attended a really wonderful DOCOMOMO lecture last night in regards to Modern landscape design. James R. Cothran lectured and featured images from a recent tour of Thomas Church designed gardens in the San Francisco area and locally, plus a pretty much intact garden in Columbus Georgia designed by James Rose - the current owner's of the latter property were also in attendance, as well as some faculty that worked with both architects during installations at UGA. Although I had an above-normal awarness of modern landscape architecture, the lecture really brought things into focus for me and provided some great ideas - also the reference materials got me searching for some books (two that I bought online today were "Invisible Gardens" on Amazon and "Modern Garden Design" by Janet Waymark) - both featured works of Church and the former James Rose.
If you're into Modernism and live in Atlanta, I highly recommend the DOCOMOMO sponsered events and lectures. Blog is here: http://www.docomomoga.org/wordpress/