Thomas, Graham Stuart
Plants for ground-cover
Oregon Sagapress, 1990
Buku Teks
Timo Pukkala, editor
Continuous cover forestry
[, Springer], 2012
eBooks
The cover Mary W. LoLordo
Artikel Jurnal
Morton, Andrew
Monica's story = Monica's story
Dabara, 1999
Buku Teks
McCrum, Robert
The story of english
Faber and Faber , 1992
Buku Teks