Previously from Mr Allen D. Christensen (1907-1989), California and Perth | Allen D. Christensen 舊藏（lot 47 and 64） Liu Guosong (Liu Kuo-sung, b.1932)Which is Earth? Ink on paper, hanging scroll Signed Liu Kuo-Sung, with one seal of the artist Dated 1970 Title-slip inscribed by the artist 120.0 x 74.0cm Provenance: Charlotte Horstmann, Hong Kong (by repute) Mr Allen D. Christensen (1907-1989), California and Perth Private collection, Perth, acquired from the above c.1981 劉國松 地球何許 設色紙本 立軸 一九七零年作 款識：劉國松，一九七零。 鈐印：劉 題簽：（劉國松）劉國松作地球何許。Which is Earth? by Liu, Kuo-sung 傳承: Charlotte Horstmann，香港（擬） Allen D. Christensen 先生（1907-1989），加州及珀斯 珀斯私人收藏，約1981年購自上述