How to know the spring flowers :
Cuthbert, Mabel Jaques.
How to know the spring flowers : pictured-keys for determining the more common spring flowering herbaceous / by Mabel Jaques Cuthbert. - Revised ed. - Iowa (USA) : WM.C. Brown, 1949. - 194 p. : il. - The pictured-key natures series .
Flores Flores de primavera
How to know the spring flowers : pictured-keys for determining the more common spring flowering herbaceous / by Mabel Jaques Cuthbert. - Revised ed. - Iowa (USA) : WM.C. Brown, 1949. - 194 p. : il. - The pictured-key natures series .
Flores Flores de primavera