P-Y. In English, Spanish and French. Correspondents include the following: F Perez Castro, Madrid 1963; Prof G Price, Stirling 1969; J S Revah, Paris 1964-66; Bill Rothwell, Manchester 1965; Dr Marius Sala, Bucharest 1957-68; Eva ?, Zurich 1964 and 1967; Samuel Stern, Oxford 1960-65; Prof Gunnar Tilander, Sweden 1966-68; Prof S Ullmann, Leeds 1946 and 1966; Prof Max Weinreich, New York 1964; Wellcome Historical Medical Library 1963; Michael J L Young, Kent 1964.