Oxford University Press, London, New York and Wellington, 1961. First edition. Grey speckled hard cover with gilt titles on black background on spine. Contents tight with number markings to the top corner of the front e/p. Some foxing and age discolouration to e/p's, page edges and throughout. 56pp. Dust jacket is edge worn and has some minor insect damage with small holes. The rear is age-discoloured with some staining. It has been price clipped. Pretty good copy of this scarce title.