Person ? H. Ligtenberg
- From 1940-01-01 to 1948-12-31, Commissaire of PLANTATIONS DE CAOUTCHOUC DE SUMATRA
- From 1940-01-01 to 1948-12-31, Commissaire of PLANTATIONS DE CAOUTCHOUC DE TAPANOELIE
- From 1940-01-01 to 1948-12-31, Commissaire of SOCIÉTÉ DE CULTURE DE PACOUDA
- From 1940-01-01 to 1953-12-31, Commissaire of SOCIETE DE CULTURE " NIEUW TJISALAK"
- From 1940-01-01 to 1953-12-31, Commissaire of SOCIETÉ DES PLANTATIONS DE CAOUTCHOUC DE KALITENGAH
- From 1953-01-01 to 1953-12-31, Commissaire of PLANTATIONS DE CAOUTCHOUC DE TAPANOELIE
- From 1953-01-01 to 1953-12-31, Commissaire of PLANTATIONS DE CAOUTCHOUC DE SUMATRA