@book{23420,
	author = {Farace, Dominic J.||Schöpfel, Joachim},
	title = {Grey Literature in Library and Information Studies},
	url = {https://library.oapen.org/bitstream/20.500.12657/45661/3/626361.pdf||https://library.oapen.org/bitstream/20.500.12657/45661/3/626361.pdf}
}