Ahlawat, A. S., and J. C. Dagar. “Effect of Different PH Light Qualities and Some Growth Regulators on Seed Germination of <I>Bidens biternata< I> (Lour.) Merr and Sherff”. Indian Forester, vol. 106, no. 9, Sept. 1980, pp. 617-20, doi:10.36808/if/1980/v106i9/11240.