"The Chemical composition of Ambrosia trifida at successive growth stages. "; "Dustman, Robert B. (Robert Barclay), 1892-", "Shriver, L. C."; "Ragweeds.", "Ambrosia trifida.", "Pastures--Research.", "Grasses--Analysis."; "Shriver, L. C.", "Dustman, Robert B. (Robert Barclay), 1892-"; "1931"; "Journal article reprint from: Journal of the American Society of Agronomy, v.23:no.3 (1931:Mar.)"; ""; "P17167"; "pec"; "Ambrosia trifida.", "Ragweeds.", "Pastures--Research.", "Grasses--Analysis."; "14256"; .