Rock for erosion control /

I tiakina i:
Ngā taipitopito rārangi puna kōrero
Ētahi atu kaituhi: Editors Lienhart , David A.
Hōputu: Pukapuka
Reo:Ingarihi
I whakaputaina: Philadelphia P. A. : American society for testing and materials , C1993 .
Rangatū:ASTm special technical publication (STP) ; 1177
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