Ngā hua rapu - "Clay Papua New Guinea."
-
1
The ceramic clays of Papua New Guinea
I whakaputaina 1978Ngā marau: “…Clay Papua New Guinea…”
Pukapuka -
2
A report on clays and other raw materials located and tested
I whakaputaina 1982Ngā marau: “…Clay Papua New Guinea.…”
Pukapuka