HuppmanW. J. and HIRSCHVOGELM. : ‘Powder forging’, Int. Met. Rev., to be published.
2.
BockstiegelG. and BLÄNDEC.-A.: Powder Met. Int., 1976, 8, 155.
3.
CorsoS.: Fiat, Torino, kindly provided the photographs of preforms and gear.
4.
MoyerK. H. : ‘Progress in powder metallurgy’, (ed. Halter)R. F., Vol. 30, p. 193. 1974: Princeton (MPIF).
5.
CorsoS.and c. DOWNEY :Powder Met. Int., 1976, 8, 170.
6.
McINTIREH. O., PetersonJ. H., and McCURDIEH. R.: ‘Modern developments in powder metallurgy’, (eds. HausnerH. H. and SmithW. E.), Vol. 6, p. 133. 1974: Princeton (MPIF).
7.
HalterR. F.: ‘Modern developments in powder metallurgy’, (eds. HausnerH. H. and SmithW. E.), Vol. 7, p. 213.1974: Princeton (MPIF).
8.
BockstiegelG. and OLSENH. : Powder Metall. (Conf. Suppl. Part I), p. 127. 1971: London (Inst. Met.).
9.
L1NDSKOGP. and GrekS. E. : Ref. 7, p. 285.
10.
BrownG. T.: Met. Technol. (May-June1976), p. 229.
11.
BrownG. T.: ‘Powder metallurgy, promises and problems’, p. 96. 1975: Paris (Soc. Franc. de Metallurgic).
12.
Work in progress at GKN.
13.
VoigtlÄNderO. : HFF-Bericht 9. Umformtechnisches Kollo-quium 1977, p. 7. 1977: Hannover (Ges. f. Produktions-technik).
14.
VoigtlanderO. : Thyssen, Remscheid, kindly provided the photographs.
