layered materials  search
UFlayered media
 multilayered materials
RTmaterials
 engineering geology
 transverse isotropy
 multiple aquifers
 delamination
 stratification
 preferential flow
 mineral interlayer
 two-layer models
SNBefore 1981, also search layered; layers. After 1992, use multiple aquifers for aquifers. Added to Thesaurus in 1981.