De sterfte der ondernemingsarbeiders in de buitengewesten (behalve ter Oostkust van Sumatra en in Atjeh) in 1930 = . Death rates and causes of death among 187106 estate-labourers in the "outer provinces" (except Eastcoast of Sumatra and Atjeh) of the Netherlands East Indies in 1930 (Varekamp, 1932)