共 79 条
[33]
GOGOLAK CV, 1978, NATURAL RADIATION EN, V1, P259
[34]
A STUDY OF RADON 220 EMANATION FROM SOILS
[J].
JOURNAL OF GEOPHYSICAL RESEARCH,
1970, 75 (02)
:357-+
[35]
GUEDALIA D, 1978, NATURAL RADIATION EN, V1, P242