Literature references

3 literature references:

Author: Terrell,E.E.
Year: 1977
Title:
Source: Checklist of Names for 3,000 Vas.Pl... Agric.Handbook No.505
Author: Balashev, L.L., Ed.
Year: 1970
Title:
Source: Dictionary of useful plants in twenty european languages.
Author: Horn,P.E. & Hill,G.D.
Year: 1987
Title:
Source: What Legume is That?