ILPAC (Independent Learning Project for Advanced Chemistry) 4 : Inorganic: s-block elements, the halogens, the periodic table. - 2nd ed. / revised by Ann Lainchbury, John Stephens, Alec Thompson. - John Murray 1995. 12862 Subjects--Topical Terms: Chemistry - Outlines, syallabi, etc. LC Class. No.: QD41 / Ind.4.