Eussen, Jacobus Henricus Helena. (1946.). Studies on the tropical weed imperata cylindrica (L.) beauv. var. major / Jacobus Henricus Helena Eussen. : .
Eussen, Jacobus Henricus Helena. Studies on the tropical weed imperata cylindrica (L.) beauv. var. major / Jacobus Henricus Helena Eussen. : , 1946.
Eussen, Jacobus Henricus Helena. Studies on the tropical weed imperata cylindrica (L.) beauv. var. major / Jacobus Henricus Helena Eussen. : , 1946..