TY  - BOOK
AU  - Patterson,James Otey
AU  - O'Donnell,George Edward
TI  - Midnight calculator: an expedient for the observance of church laws involving the reckoning of time
AV  - QB211 .P3
PY  - 1950///
CY  - Philadelphia
KW  - Time
KW  - Conversion tables
KW  - Church calendar
N1  - Diagram with movable part in pocket
ER  -