Brattice-Window-Method for measuring leakage through mine stoppings.

I tiakina i:
Ngā taipitopito rārangi puna kōrero
Kaituhi matua: Vinson, Robert P.
Ētahi atu kaituhi: Thimons, Edward D., Kissell, Fred N.
Hōputu: Pukapuka
Reo:Ingarihi
I whakaputaina: [Washington] U.S.Dept.of the Interior,Bureau of Mines 1977
Rangatū:Report of investigations 8240
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