Supplements to the 2nd edition of rodd's chemistry of carbon compounds: vol IV, Heterocyclic Compounds; Part K: Heterocyclic Compounds: Six-membered heterocyclic compounds with two or more Hetero-Atoms, one or more of which are from groups, I, III, IV or VII of the Periodic Table. Heterocyclic Compounds with seven or more atoms in the ring, edited by MF Ansell. Elsevier Science Publishers, Amsterdam, 1989, xxii + pp 626, US$ 294.75, Dfl 560.00; subscr. price; US$ 268.50, Dfl 510.00