作者:DOWNEY, HK; HELLRIEGEL, D; SLOCUM, JW
作者单位:University of Kentucky; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park
作者:KILMANN, RH
作者单位:Pennsylvania Commonwealth System of Higher Education (PCSHE); University of Pittsburgh
作者:JUSTIS, RT
作者单位:Texas Tech University System; Texas Tech University