Preprints presented at the ASLE 1982 annual meeting. Preprints presented at the ASLE 1976 annual meeting : Preprints presented at the ASLE 1980 annual meeting : Preprints presented at the ASLE 1981 annual meeting : Preprints presented at the ASLE 1985 annual meeting : Preprints presented at the ASLE 1977 annual meeting :