Collection of publications of the National Speleological Society, including Bulletins 15 ("The American Caver ", December 1953), and 16 ("The American Caver", December 1954), together with numbers 17 (December 1955), 18, 19, 21 (parts 1 & 2), 24 (part 1), 26 (parts 2, 3,4), 27 (parts 1, 2), 28 (parts 3, 4), 29 (part 3), 30 (parts 1, 2, 3, 4), 31 (parts 2, 3, 4), 32 (parts 1, 2, 3), 33 (parts 1, 2, 4), and 34 (parts 1, 2, 3), plus NSS NEWS, issues volume 22 (number 11), v.23 (no.3), v.25 (no.11), and v.27 (no.6).