Parodia penicillata var. nivosa Backeberg + Fechser

@book{nokeyo,

title = {Die Gattung Parodia - Spegazzini - Eine morphologische Revision},

author = {Fred H. Brandt},

editor = {Eigenverlag},

year  = {1989},

date = {1989-10-01},

urldate = {1989-10-01},

publisher = {Eigenverlag},

series = {Die Gattung Parodia - Spegazzini - Eine morphologische Revision},

keywords = {},

pubstate = {published},

tppubtype = {book}

}

@book{nokey,

title = {Die Gattung Parodia (Band 1)},

author = {Walter Weskamp},

editor = {Eigenverlag},

year  = {1987},

date = {1987-02-01},

urldate = {1987-02-01},

volume = {1},

number = {Eigenverlag},

series = {Die Gattung Parodia (Band 1)},

keywords = {},

pubstate = {published},

tppubtype = {book}

}