@misc{Hazelhoff_Engel_Hendrik_(1900–1945)_De_1941, author={Hazelhoff, Engel Hendrik (1900–1945)}, copyright={Public Domain}, address={[unknown]}, journal={Publications of famous biologists - a collection of prints}, howpublished={online}, year={1941}, publisher={[unknown]}, language={dut}, type={Text}, title={De ademhaling der Waterdieren}, URL={http://rcin.org.pl/Content/127261/PDF/WA488_159919_19746_s2487.pdf}, keywords={Aquatic animals - gill breathing - oxygen uptake through the body surface}, }