Link to Resource File(s) Roelle et al 2015 USGS Internal report to BLM_Second SpayVac Trial 2014-2015.pdf Basic Information Summary or Abstract Unpublished report from USGS to BLM. In a 2014-2015, second trial of the 'SpayVac' PZP vaccine, a low number of mares was effectively contracepted, and the trials were halted early. Author or Creator Roelle et al Citation Information Available from BLM Library? No Source Information Internal/External Usage Internal Tagging Information BLM Program Wild Horses & Burros
