 Complete the following phrase:  By the 1960s the partys membership had fallen to around 5,000, but it continued to hold positions in a number of trade unions, and it was also influential in the various protest movements of the period, especially the movement against the Vietnam War. This period also saw the establishment of the National Training Centre in Minto, NSW, ostensibly for the purpose of educating in the ideology of Marxism-Leninism. The party became more openly critical about the Soviet Union and the Communist Party of the Soviet Union. In 1966, the party started their own magazine called Australian Left Review. In 1967, the party ceased receiving payments from the Communist Party of the Soviet Union following a seminar by Laurie Aarons in the Soviet Union which argued that ideas require free contest, not confined in a framework of established dogmas that can become a rigid or even ossified edifice. But the Soviet 