Correspondents include: Dr Robert E Seegmiller; Dr Paul B Selby; Selecta Verlag, Dr Ildar Idris; C G Seligmann; Dr Mary J Seller; Prof I W Selman; E R Senanayake; Prof P Sengel; Prof J A Serra; Prof B R Seshachar; B R Sethi; Prof L Severe; E W Sexton; Prof Teodor Shanin; Dr Alexander Shapiro; Mrs Haja Shareeff; Dr B N Sharma; Prof G P Sharma; Prof K N Sharma (also Prof M C Goswani); R E Sharma; Dr H H Shatoury; John Shaver; Philip M Sheppard; Dr Michael B Shimkin, Journal of the National Cancer Institute; John G M Shire; Donald Shole; Dr P L Shukla; Dr Knud Sick; N S Sidhu; Dr Richard L Sidman (also John L Fuller, The Jackson Laboratory); Dr E G Silas (also D B James); Dr Martin Silberberg; R G Silson; Dr Mangala de Silva; P H L Silver; Dr Willys K Silvers; Charlotte Simenauer; H A Simons, The Year Book Publishers Inc: Prof H A B Simons; Anil K Sinha; D K L H G Siritunga; Prasad Sircar; Prof M J Sirks; J L Sirlin; Dr H A Sissons, Bone and Tooth Society; Dr Kurt Sittmann; Dr S Sivaprasad; Dr Eliot Slater; J Slee; Dr Slizynski; Dr L H Smaje; Dr Isabel Smaller; Dr Jean M Smellie; Dr Alick D Buchanan Smith: Cedric Smith (also Piri and Lionel Smith); Dr David W Smith; G K A Smith; Prof J E Smith; John Maynard Smith; Prue Smith; S E Smith