Revision of North-American species of Astragalus This book, "Revision of North-American species of Astragalus", by Marcus E. Jones, is a replication of a book originally published before 1923. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.