@misc{Roll_Hartwig_(?-1945)_Pflanzensoziologische_1945,
 author={Roll, Hartwig (?-1945)},
 copyright={Public Domain},
 journal={Publications of famous biologists - a collection of prints},
 address={[unknown]},
 howpublished={online},
 year={1945},
 publisher={[unknown]},
 language={ger},
 type={Text},
 title={Pflanzensoziologische methoden in der limnobotanik},
 URL={http://rcin.org.pl/ibd/Content/127160/PDF/WA488_159792_19746_s2277.pdf},
 keywords={Limnology - general research methods - water reservoirs - school in Upsala and others},
}