the Royal Society
[1897]-
no. 68 (1964) , no. 69 (1965) , no. 73 (1969) , no. 74 (1970) , no. 75 (1971) , no. 76 (1972) , no. 77 (1973) , no. 78 (1974) , no. 80 (1976) , no. 81 (1977) , no. 82 (1978) , no. 83 (1979) , no. 84 (1980) , no. 85 (1981)
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