Mga kaalaman tungkol sa kalendaryo 著者: Lawagan, Ernesto

Time in world history 著者: Stearns, Peter N.

Keeping track...day by day 著者: Daza, Julie Y.

Keeping track...counting the days. IN Meduim Rare [column] 著者: Daza, Julie Y.

Seasonal customs of Korea 著者: Shaffer, David E.

The Oxford companion to the year 著者: Blackburn, Bonnie J.

Questioning the millennium a rationalist's guide to a precisely arbitrary countdown 著者: Gould, Stephen Jay

Calendars and constellations of the ancient world 著者: Plunket, Emmeline

Calendars and constellations of the ancient world 著者: Plunket, Emmeline M. b. 1835

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[Virgin Mary].