Cornelis den Hartog

• The sea-grasses of the world
• A synopsis of the Lemnaceae
• Blyxa quadricostata nov. sp., a new Hydrocharitacea from Thailand
• Gezonde voeding, gezonde mensen
• Some aspects of brackish-water biology
• The epilithic algal communities occurring along the coast of the Netherlands
• Two new species of Hydrocharitaceae