Wei Collection, Middle Volume. Radical: Net (wǎng). Kangxi strokes: 11. Page 947, Entry 18.
In Wide Rhymes (Guangyun), pronounced gu. In Collected Rhymes (Jiyun), Rhyme Meetings (Yunhui), and Correct Rhymes (Zhengyun), pronounced gu.
As defined in Explaining Graphs and Analyzing Characters (Shuowen): A fish net.
As defined in Literary Expositor (Erya), section on utensils: A fish net is called a gu. Commentary: This is the largest type of net.
Book of Odes (Shijing), Odes of Wei: Casting the net with a splashing sound.
Discourses of Lu (Luyu): The water official then demonstrates the use of nets and weirs to catch famous fish.
Also, in Zhang Heng's Rhapsody on the Western Capital (Xijing fu): The net appearing vast and open. Commentary: Describes its appearance.