Available on microfilm from University Microfilms.
Vols. for Jan. 1942-<Nov. 1954> published by the University of Chicago (in collaboration with the American Astronomical Society); <Aug. 15, 1975-> by the University of Chicago Press for the American Astronomical Society.
Vols. 1-25, 1895-June 1907. 1 v.; Vols. 26-50, July 1907-1919. 1 v.; Vols. 51-75, Jan. 1920-June 1932. 1 v.; Vols. 76-100, July 1932-Nov. 1944. 1 v.; Vols. 101-135, Mar. 1954-May 1962. 1 v.; Vols. 136-145, July 1962-Sept. 1966. (Includes index to Astrophysical journal. Supplement series v. 7-13, May 1962-Oct. 1966) 1 v.; Vols. 101-145 (Includes index to Astrophysical journal. Supplement series, v. 1-13, 1954-Oct. 1966).
Summary:
"Letters to the Editor" issued as Part 2 and separately paged from v. 148, 1967.
