IDRelationTitle19660027155WorkSampling organisms and related problems19660027156WorkFeeding19660027157WorkThe quality of food19660027158WorkSeasonal aspects of food relationships and breeding19660027159WorkEffects of quantity, quality, change of diet and nutritional value of food19660027160WorkAlgal mutualism19660027161WorkPlankton19660027162WorkVertical migration19660027160WorkAlgal mutualism19660027161WorkPlankton19660027155WorkSampling organisms and related problems19660027156WorkFeeding19660027162WorkVertical migration19660027157WorkThe quality of food19660027159WorkEffects of quantity, quality, change of diet and nutritional value of food19660027158WorkSeasonal aspects of food relationships and breeding