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2. In-place MSW unit weight measurement in São Carlos landfill, Brazil;Abreu,2013
3. Standard Test Methods for Crosshole Seismic Testing;ASTM D4428,2007
4. Bison Instruments, Inc., 1982. Crosshole Shear Wave System – Instruction Manual, Minneapolis, U.S.A, 29p.
5. A case study of the Brookhaven Landfill, Long Island, New York;Carey,1993