Kostermans suffered a heart attack in March 1991, but his letter to his friend written in April 1991 stated "some writing (including) putting the finishing touch to a fat manuscript on the Mango species (69 species) ...
Kostermans fick en hjärtattack i mars 1991, men ett brev som han skrev till en vän i april 1991 klargjorde att "some writing (including) putting the finishing touch to a fat manuscript on the Mango species (69 species) ...