Please contact the publisher for availability of back issues.
Reprints of individual articles, reprints of out-of-print issues, and microfilms of back volumes are available from:
University Microfilms International, 300 North Zeeb Road, Ann Arbor, MI 48106.
Back issues from 1969 are available online to participating libraries and institutions via JSTOR.
Back volumes from 1969 through 1987 in reprint edition may be obtained from:
Schmidt Periodicals GmbH, Ortsteil Dettendorf, D-83075 Bad Feilnbach, Germany.