STEFFENSEN, D Autoradiographs of pollen tube nuclei with calcium-45. [electronic resource] - The Journal of biophysical and biochemical cytology Dec 1959 - 339-42 p. digital Publication Type: Journal Article ISSN: 0095-9901 Standard No.: 10.1083/jcb.6.3.339 doi Subjects--Topical Terms: AutoradiographyCell Nucleus--chemistryFlowersLiliumPlants--chemistryPollenPollen Tube