. . "Sorption of metal ions to wood, pulp and bark materials / Pingping Su, 2012. - . - LC Authorities. - http://lccn.loc.gov/nb2012027301. - 2015-01-27"@fr . "Pingping Su"@fr . "2015-01-27" . "male" . "Pingping Su" . "2016-02-17" . . . . . . "16941303"^^ . . . . "Su" . . . "Pingping" . . "0000000390320966" . "ISNI" . . "2016-02-17"^^ . .