by Cornelis den Hartog
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The sea-grasses of the world
Gezonde voeding, gezonde mensen
Some aspects of brackish-water biology
A synopsis of the Lemnaceae
Blyxa quadricostata nov. sp., a new Hydr...
The epilithic algal communities occurrin...
A revision of the genus Hydrocharis (Hyd...
A revision of the genus Blyxa (Hydrochar...
Zur Entwickelungsgeschichte der Vallisne...
Preliminary note on the rate of growth o...
Surveys for insects that feed on eurasia...