7. |
Materials
|
LC Classification (LCC)
|
ClassNumber Topic |
|
TP810.5 |
|
Technology--Chemical technology--Clay industries. Ceramics. Glass--Ceramic technology. Pottery--Materials ; Materials--Ceramic technology |
19. |
Tanning materials
|
LC Classification (LCC)
|
ClassNumber Topic |
|
HD9779 |
|
Social Sciences--Industries. Land use. Labor--Special industries and trades--Manufacturing industries--Tanning materials ; Tanning materials industry |
20. |
Educational technology industries
|
LC Classification (LCC)
|
ClassNumber Topic |
|
HD9811 |
|
Social Sciences--Industries. Land use. Labor--Special industries and trades--Manufacturing industries--Educational supplies. Instructional materials--Educational technology industries ; Educational technology industries |