Yet, as has been shown above, the structural perspective does not necessarily put 'class interests' and 'economic forces' as the only kinds of determining agents. Implicit in the concept of structure is a system which gives dominance to a range of powerful groups (see Degeling and Colebatch, 1984, for a discussion of the relevance of this sociological theory for public administration). Such groups will include professional and bureaucratic elites: males; specific ethnic, religious, linguistic groups and so on. This dominance is given structural form by customary practices and modes of organisation. It may well be built into language, and manifested symbolically in a variety of ways.