Thonner's Analytical Key to the Families of Flowering Plants
by R. Geesink, A. J. M. Leeuwenberg, C. E. Ridsdale, J. F. Veldkamp
Angiosperms
Writing a summary for young readers…
For young readers
Book data: Open Library
by R. Geesink, A. J. M. Leeuwenberg, C. E. Ridsdale, J. F. Veldkamp
Book data: Open Library