TY  - BOOK
AU  - Steel,Duncan
TI  - Marking time: the epic quest to invent the perfect calendar 
SN  - 0471298271 (alk. paper)
AV  - CE6 .S74 2000
U1  - 529/.3 21
PY  - 2000///
CY  - New York
PB  - J. Wiley
KW  - Calendar
KW  - History
N1  - Includes bibliographical references (p. 399-400) and index
ER  -