What does PRPM stand for?
PRPM stands for "Pittsburgh Room and Pillar Mine"
How to abbreviate "Pittsburgh Room and Pillar Mine"?
"Pittsburgh Room and Pillar Mine" can be abbreviated as PRPM
What is the meaning of PRPM abbreviation?
The meaning of PRPM abbreviation is "Pittsburgh Room and Pillar Mine"
What does PRPM mean?
PRPM as abbreviation means "Pittsburgh Room and Pillar Mine"
