1. The UK national external quality assessment scheme in blood group serology. Compatibility testing. 1979-1980;HOLBURN;Clin. lab. Haemat,1982a
2. The UK national external quality assessment scheme in blood group serology. Compatibility testing 1979-1980: trends and performance in relation to practice in antiglobulin testing;HOLBURN;Clin. lab. Haemat,1982b