Mercer, David, 1928-1980. Duck song / David Mercer. - London : Eyre Methuen, 1974. - 77 p. ; 20 cm. - A Methuen modern play . ISBN: 041332320X : 0413323307 £2.00. LCCN: 75308596 Nat. Bib. No.: GB74-19591 LC Class. No.: PR6063.E7 / D8 Dewey Class. No.: 822.91 Mer/Duc