Notes:
Conflicting copyright information is given in the Catalog of Copyright Entries, Third Series, Vol. 9, Part 2, No. 1, Periodicals, January-June 1955, page 87. Issue #48 is listed twice. The first entry has the date "27Dec54" and a registration number of B515922. The second entry has the date "26Nov54" and a registration number of B517998. Issue #47 is listed with the date "26Nov54" and a registration number of B517999. Both of the entries for #48 are renewed on November 19, 1982, under the registration numbers RE146396 and RE146395, respectively. Given that the date for the second entry for issue #48 is the same as the date for issue #47, it can be concluded that the second entry is the incorrect one.