Sewell P., Cleark B. ., . (1991). Chromotographic Separations. [s.l]: John Wiley.
Sewell P.A, Cleark Brian, . 1991. Chromotographic Separations. [s.l]: John Wiley.
Sewell P.A, Cleark Brian, . Chromotographic Separations. [s.l]: John Wiley. 1991.