TY  - BOOK
AU  - Walker,E.H.
TI  - Plants collected by R.C.Ching in S.Mongolia & Kansu Prov.China
PY  - 1941///
PB  - Washington,Smithsonian Inst.,US Nat.Mus.,Ex.Contrib.from the US Nat.Herb.,Vol.28,P.4,pp.563-675
ER  -