[MARMAM] Contributors to the Handbook of Marine Mammals who have died

Dear MARMAM,  We are currently working on the second edition of the Handbook of Marine Mammals, originally edited by Ridgway and Harrison.  Sadly, many of the contributors to the first edition have passed away and we want to honor them in the new edition.  We are having trouble finding the years of birth and death for the following colleagues:Robin C. BestKeith A. HayGeorge E. Heinsohn If you can help with any of this info., we would really appreciate it.Best wishes,Tom Jeffersonsclymene@aol.com