The Institute of World Economy and International Relations , Maclean 's workplace , reported his death at the age of 69 on 6 March 1983 .
Maclean was reported seriously ill with pneumonia in December 1982 , and was housebound after his recovery .
The Institute of World Economy and International Relations , Maclean 's workplace , reported Maclean 's death at the age of 69 on 6 March 1983 .
Maclean was reported seriously ill with pneumonia in December 1982 , and was housebound after his recovery .