Gregg, S. J. Adsorption, surface area and porosity / S. J. Gregg, K. S. W. Sing - 2nd ed. - London : Academic Press, 1982 - xi, 303 p. : ill. ; 24 cm. Includes index ISBN: 0123009561 Subjects--Topical Terms: Gases--Absorption and adsorptionSolids--Surfaces