Witkamp, M Retention and loss of cesium-137 by components of the groundcover in a pine (Pinus virginiana L.) stand. [electronic resource] - Health physics Sep 1967 - 985-90 p. digital Publication Type: Journal Article ISSN: 0017-9078 Standard No.: 10.1097/00004032-196709000-00005 doi Subjects--Topical Terms: Cesium Isotopes--metabolismPlants--metabolismRadiobiology