TY  - SER
AU  -  Vries, Hugo de, 
TI  -  Species and Varieties, Their Origin by Mutation 
AV  - QH 
PY  - 2005///
PB  -  Project Gutenberg, 
KW  -  Plants -- Evolution
KW  -  Plant mutation
KW  -  Evolution (Biology)
KW  -  Plants -- Variation
KW  -  Plant hybridization
N1  -  Public domain in the USA;  Text
UR  -  http://www.gutenberg.org/ebooks/7234
ER  -