Polytechnic High 1966 Polytechnic High 1967 Polytechnic High 1968 Polytechnic High 1969 Polytechnic High 1969 Polytechnic High 1970 Polytechnic High 1973 Polytechnic High 1974 Polytechnic High 1975 Polytechnic High 1978 Polytechnic High 1982 Polytechnic High 1989
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