{Reference Type}: Journal Article {Title}: Thrombin: An Approach to Developing a Higher-Order Reference Material and Reference Measurement Procedure for Substance Identity, Amount, and Biological Activities. {Author}: Jackson CM;Esnouf P;Duewer DL; {Journal}: J Res Natl Inst Stand Technol {Volume}: 125 {Issue}: 0 {Year}: 2020 {Factor}: 1.324 {DOI}: 10.6028/jres.125.021