TY  - BOOK
AU  - Puthraan, Manohar R.
TI  - Time the cycle of seven: everything you always wanted to know about the gregorian calendar with infinite methods for "day-date" calculation 
U1  - 529.3 
PY  - 2000///
CY  - New Mumbai
PB  - MRP Publishing House
KW  - Mathematics
N1  - Includes bibliographical references and index
ER  -