Mercado, B., & Swarbrick, J. (1987). Weed science weed control Southeast Asia. Food and Agriculture Organization of the United Nations.

Mercado, B.L, and J.T Swarbrick. Weed Science Weed Control Southeast Asia. Rome: Food and Agriculture Organization of the United Nations, 1987.

Mercado, B.L, and J.T Swarbrick. Weed Science Weed Control Southeast Asia. Food and Agriculture Organization of the United Nations, 1987.