Program: HathiTrust Digital Library

  • Publisher: The Observatory
  • Print ISSN:
  • Electronic ISSN:
  • OCLC Number: 9250827
  • Validation: None
  • Retention: permanent
  • Institution: HathiTrust
  • Facility:
  • OCLC Symbol: HATHI
  • Holdings Format: Print
Materials Archive Action Date of Action Program Status/Note
no.136 1955; no.135 1957; no.138 1957; no.139 1958; no.140 1959; no.141 1960; no.142 1961; no.143 1962; no.144 1963; no.145 1964; no.146; no.146 1965; no.147; no.148; no.148 1966; no.149; no.149 1968; no.151. 1968; no.153 1969; no.156; no.157 1970; no.150 1971; no.152. 1972; no.154 1973; no.155 1974; no.158 1976; no.159 1977; no.160 1978; no.161 1979; no.162; no.163; no.164; no.165; no.166; no.167 1983; no.168
committed to retain 2017-06-05 HTDL