experimental investigation of protective filters / by G.E. -Bertram.
Bertram, G.E.
experimental investigation of protective filters / by G.E. -Bertram. - Cambridge, Mass. : Harvard University, Graduate School of Engineering - 21 p. - Harvard soil mechanics Series ; no. 7 .
experimental investigation of protective filters / by G.E. -Bertram. - Cambridge, Mass. : Harvard University, Graduate School of Engineering - 21 p. - Harvard soil mechanics Series ; no. 7 .