@misc{Cavers_Francis_(1876–1936)_Practical_1937,
 author={Cavers, Francis (1876–1936)},
 copyright={Public Domain},
 address={London},
 howpublished={online},
 year={1937},
 publisher={University Tutorial Press Ld.},
 language={eng},
 title={Practical botany},
 type={Text},
 URL={http://www.rcin.org.pl/Content/145387/PDF/KR171_161347_Cavers-Practical-botany_1937-ed4.pdf},
}