Authors: L J Old; E A Boyse; H F Oettgen; E D Harven; G Geering; B Williamson; P Clifford Journal: Proc Natl Acad Sci U S A Date: 1966-12 Impact factor: 11.205
Authors: G Klein; P Clifford; E Klein; R T Smith; J Minowada; F M Kourilsky; J H Burchenal Journal: J Natl Cancer Inst Date: 1967-11 Impact factor: 13.506
Authors: A de Schryver; S Friberg; G Klein; W Henle; G Henle; G De-Thé; P Clifford; H C Ho Journal: Clin Exp Immunol Date: 1969-11 Impact factor: 4.330
Authors: G Klein; G Pearson; J S Nadkarni; J J Nadkarni; E Klein; G Henle; W Henle; P Clifford Journal: J Exp Med Date: 1968-11-01 Impact factor: 14.307