Sidonie K. Lederer (Lederer, Sidonie K.)

• 
  The Selected Letters of Anton Chekhov
  by Anton Pavlovich Chekhov, Lillian Hellman, Sidonie Lederer
  Hardcover, Farrar, Straus, Giroux, ISBN 0374258007 (0-374-25800-7)
• 
  The Selected Letters of Anton Chekhov
  by Lillian Hellman
  Softcover, Farrar Straus & Giroux, ISBN 0374518386 (0-374-51838-6)