What does PER stand for?
PER stands for "Prediction of Earth Rotation"
How to abbreviate "Prediction of Earth Rotation"?
"Prediction of Earth Rotation" can be abbreviated as PER
What is the meaning of PER abbreviation?
The meaning of PER abbreviation is "Prediction of Earth Rotation"
What does PER mean?
PER as abbreviation means "Prediction of Earth Rotation"
