Root development in the grassland formation, a correlation of the root systems of native vegetation and crop plants Weaver, John E. (John Ernest),‏ ‎ 1884-1966 creator text book Washington Carnegie inst. of Washington 1920 1920
print
ENG Roots (Botany) https://www.biodiversitylibrary.org/bibliography/45903 10.5962/bhl.title.45903 OTU