Proof of poison /
Thorwald, Jürgen.
Winston, Richard.
Winston, Clara.
London Pan Books
1969
Originally published in this form (B66-19264), London: Thames & Hudson, 1966. The third of three extracts from 'The century of the detective'. New York: Harcourt, Brace & World, 1965. Originally published as 'Das Jahrhundert der Detektive'. Zurich: Droemer, 1964
bibl p186-197
Poisoning.