National Speleological Society United States of America. NSS Bulletin. No.3 Jan 1942 No.4 Sept 1942 No.5 Oct 1943 No.6 July 1944 No.7 Dec 1945 No.8 July 1946 No.9 Sept 1947 No.10 April 1948 No.11 Nov 1949 No.12 Nov 1950 No.13 Dec 1951 No.14 Sept 1952 aka 'The American Caver' No.15 Dec 1953 aka 'The American Caver' No.16 Dec 1954 aka 'The American Caver' No.17 Dec 1955 No.18 Dec 1956 No.19 Oct 1957 No.20 Nov 1958 Vol.21 Part 1-2 1959 Vol.22 Part 1-2 1960 Vol.23 Part 1-2 1961 Vol.24 Part 1-2 1962 Vol.25 Part 1-2 1963 Vol.26 No.1-4 1964 Vol.27 No.1-4 1965 Vol.28 No.1-4 1966 Vol.29 No.1-4 1967 Vol.30 No.1-4 1968 Vol.31 No.1-4 1969 Vol.32 No.1-4 1970 Vol.33 No.1-4 1971 Vol.34 No.1-4 1972 Vol.35 No.1-4 1973 Vol.36 No.1-4 1974 Vol.37 No.1-4 1975 Vol.38 No.1-4 1976 Vol.39 No.1-3 1977 Vol.40 No.1-4 1978 Vol.46 No.1,2 1984 Vol.50 No.1 1988 Vol.51 No.1,2 1989 Vol.52 No.1,2 1990 Vol.54 No.1 1992 Vol.56 No.2 1994 Vol.57 No.1,2 1995 Journal of Cave and Karst Studies (Formerly NSS Bulletin) Vol.58 No.1, 3 1996 Vol.59 No.1-3 1997 Vol.62 No.2 Vol.62 No.3 NSS Speleo Digest 1956 1957 Members Manual 1979 NSS The News Vol. 6 No.1-12 1948 Vol. 7 No.1-12 1949 Vol. 8 No.1-12 1950 Vol. 9 No.1-3,5-12 1951 Vol.10 No.1-12 1952 Vol.11 No.1-12 1953 Vol.12 No.1-8,10-12 1954 Vol.13 No.1-12 1955 Vol.14 No.1-12 1956 Vol.15 No.1-15 1957 NSS News (formerly The News) Vol.16 No.1-12 1958 Vol.17 No.1-12 1959 Vol.18 No.1-12 1960 Vol.19 No.1-12 1961 Vol.20 No.1-12 1962 Vol.21 No.1-12 1963 Vol.22 No.1-12 1964 Vol.23 No.1-12 1965 Vol.24 No.1-12 1966 Vol.25 No.1-12 1967 Vol.26 No.1-12 1968 Vol.27 No.1-12 1969 Vol.28 No.1-12 1970 Vol.29 No.1-12 1971 Vol.30 No.1-12 1972 Vol.31 No.1-12 1973 Vol.32 No.1-12 1974 Vol.33 No.1-12 1975 Vol.34 No.1-12 1976 Vol.35 No.1-12 1977 Vol.36 No.1-12 1978 Vol.37 No.1-9,11,12 part 1 1979 Vol.38 No.1,4-12 1980 Vol.39 No.1-12 1981 Vol.40 No.1-12 1982 Vol.41 No.1-12 1983 Vol.42 No.1-12 1984 Vol.43 No.1-12 1985 Vol.44 No.1-12 1986 Vol.45 No.1-12 1987 Vol.46 No.1-12 1988 Vol.47 No.1-2,4-12 1989 Vol.48 No.1-13 1990 Vol.49 No.1-5(1&2),7-12 1991 Vol.50 No.1-12 1992 Vol.51 No.1-12 1993 Vol.52 No.1-5(1+2),6-12(1+2) 1994 Vol.53 No.1-9,11-12 1995 Vol.54 No.1-4,8-12 1996 Vol.55 No.1-4,6-12 1997 Vol.56 No.1-12 1998 Vol.57 No.1-12 1999 Vol.58 No.1-10, 12 2000 Vol.59 No.1-12 2001 Vol.60 No.1-12 2002 Vol.61 No.1-12 2003 Vol.62 No.1-5,7-12 2004 Vol.63 No.2-9,9part2,10-12 2005 Vol.64 No.1-12 2006 NB July 2006 numbered as 6 Vol.65 No.1-12 2007 Vol.66 No.1-12 2008 Vol.67 No.1-12 2009 Vol.68 No.1-7,9-12 2010 Vol.69 No.1-12 2011 Vol.70 No.1-12 2012 Vol.71 No.1-12 2013 Vol.72 No.1-9,11,12 2014 Vol.73 No.1-5,7- 12 2015 Vol.74 No.1-12 2016 Vol.75 No.1-12 2017 Vol.76 No.1-11 2018 Vol.77 No.2,4,5,8-12 2019 Occasional Papers No.1 1954,The origin of Helictites. No.2 1955,Vertical shafts in limestone caves.