P-ISSN 0008-0845
E-ISSN 2160-8091
Vol. 27, Issue 2, 1973February 01, 1973 PDT 
ccby-nc-nd-4.0 
Roundup - - a new perennial weed killer 
Roundup - - a new perennial weed killer
A Lange, H Kempen, W McHenry, O Leonard, 
Lange, A, H Kempen, W McHenry, and O Leonard. 1973. “Roundup - - a New Perennial Weed Killer.” California Agriculture 27 (2): 6–7.