Tolong jelaskan mengenai (1). Ambarawa: Jawa Tengah dari Pertanian dan perkebunan di Indonesia

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Houben, Vincent J.H., “Private Estates in Java in the Nineteenth Century. A Reaprisal”, J.Th. Lindblad, ed., New Challenges in the Modern Economic History of Indonesia. Leiden: Programme of Indonesian Studies, 1993.

Soegijanto Padmo, Tobacco Plantations and Their Impact on Peasant Society and Economy in Surakarta Residency:1860-1980s. Yogyakarta: Aditya Media, 1999

Van der Eng, Pierre, Agricultural Growth in Indonesia Since 1880. Groningen: Universiteitsdrukkerij Rijkuniversitiet Groningen, 1993.

Badan Agribisnis Departemen Pertanian. 1999. Investasi Agribisnis Komoditas Unggulan Tanaman Pangan dan Hortikultura. Kanisius. Yogyakarta

Danarti dan Sri Najiyati. 1998. Palawija, Budidaya dan Analisis Usaha Tani. Penerbit Swadaya, Jakarta.

Rahmat Rukmana, H. Ir. 1997. Ubi Kayu, Budidaya dan Pascapanen. Penerbit Kanisius (Anggota IKAPI), Yogyakarta.