Lumpkin et al., 1980. Economic Botany, 34 (2): 111-153 Document reference Lumpkin, T. A. ; Plucknett, D. L., 1980. Azolla: Botany, physiology, and use as a green manure. Economic Botany, 34 (2): 111-153Web http://link.springer.com/article/10.1007%2FBF02858627Citation key Lumpkin et al., 1980Datasheets Azolla
