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https://lscpagepro.mydigitalpublication.com/public[...]09/27/2019JavaScriptItem is within a single large
https://www.gcmonline.com/news/iron-sulfate-poa01/24/2019Variant title "Ironing your poa annua?: Virginia Tech researchers studied iron sulfate in combination with PGRs for Poa suppression on a creeping bentgrass green"
http://www.gcsai.org/greenside-magazine.php?id_mag=36Item not verifiedPDF ReaderItem is within a limited-acces websiteGreenside reprint; Variant pictures
https://archive.lib.msu.edu/tic/gcman/article/2019[...]05/15/2019PDF ReaderItem is within a single large file; Direct download