Ram, M D An external counting method for measurement of glomerular filtration rate. [electronic resource] - The British journal of surgery May 1969 - 386 p. digital Publication Type: Journal Article ISSN: 0007-1323 Subjects--Topical Terms: Creatinine--metabolismDiatrizoate--metabolismGlomerular Filtration RateHumansIodine RadioisotopesMethods