A field efficacy study of strychnine and zinc phosphide grain baits using nontoxic prebait for the control of the Columbian ground squirrel (Spermophilus columbianus) - Sullivan, Daniel,; Baril, Steven F.; Montana. Environmental Management Division. Technical Services Bureau. (Helena, Mont, Montana Dept. of Agriculture, Environmental Management Division, Technical Services Bureau, [1981])
https://www.biodiversitylibrary.org/bibliography/115221
Keywords: Control|Ground squirrels|Montana|Powell County|Rodents|Strychnine|Testing|Zinc phosphide|