@misc{Michurin_Ivan_Vladimirovich_(1855–1935)_Principles_1952,
 author={Michurin, Ivan Vladimirovich (1855–1935)},
 copyright={Public Domain},
 address={Moscow},
 howpublished={online},
 year={1952},
 publisher={Foreign Languages Publishing House},
 language={eng},
 type={Text},
 title={Principles and methods},
 URL={http://rcin.org.pl/ibd/Content/152618/PDF/WA488_187265_2247_Michurin-Principles.pdf},
 keywords={Fruit-culture - Soviet Union, Plant hybridization, Plant breeding},
}