Current location - Education and Training Encyclopedia - Graduation thesis - What do 9, 1 and 3 in UDC classification number 547.9 13 stand for respectively? Where can I find it? I can only find out the meaning of the main classification number 547. thank you
What do 9, 1 and 3 in UDC classification number 547.9 13 stand for respectively? Where can I find it? I can only find out the meaning of the main classification number 547. thank you
This website could have been tried: Lang = Late.
But only 547.6438+0 in 547 organic chemistry. Unfortunately, we didn't find 547.6438+03.
You can go to the websites of major libraries in China. If not, go to some library websites in America. Maybe there will be.