(1) Report of the National Committee on Calendar Simplification for the United States, submitted to the Secretary of State, Washington, August 1929 (2) Thirteen-Month Calendar
1972 ◽
Vol 28
(4)
◽
pp. 429-440
1999 ◽
Vol 123
(4)
◽
pp. 285-289
◽
1970 ◽
Vol 26
(3)
◽
pp. 291-301
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Keyword(s):
1973 ◽
Vol 15
(4)
◽
pp. 454-471
◽
Keyword(s):
2015 ◽
Keyword(s):