Literatur
- Asian Association of Agricultural Engineering . 1992, 1994 . Proceedings of the Agricultural Engineering Congresses Bangkok . 1992, 1994 , Thailand. (1992, 1994):
- Borlaug , N.E. and Dowswell , C.R. 1994 . Feeding a human population that increasingly crowds a fagile planet . Keynote lecture of the 15th ISSS‐Congress . 1994 , Acapulco. pp. 1 – 15 . Mexico Supplement to Transaction
- International Commission on irrigation and Drainage . 1993 . Transactionof the ICID‐Congress . 1993 , The Hague, Netherlands. Vol. 1 , pp. 9 Bände, Cairo, Egypt (1996)A‐I
- International Society of Soil Science: . 1994 . Transactions of the 15th World Congress of Soil Science . 1994 , Acapulco, Mexico. Vol. l , pp. 14 Bände ()a–9
- Mulik , B. and Dhumal , S. 1996 . Proceedings of the International Agricultural Engineering Conference . 1996 , Pune, India. Vol. 1 , pp. 594
- Neef , E. 1956 . “ DasGesicht der Erde. Brockhaus Nachschlagewerk Physische Geographie ” . In BrockhausVerlag Leipzig , Vol. 5 , 627 Auflage .
- Sehgal , J.L. and Abrol , I.P. 1994 . Soildegradation in India‐status and impact . Transaction of the 15th World Congress of Soil Science . 1994 , Acapulco, Mexico. Vol. 7a , pp. 188 – 212 .
- Statistisches Jahrbuch,1996 für das Ausland Hrsg . 1996 . StatistischesBundesamt Wiesbaden, Metzler‐Poeschel 399 Stuttgart
- Verheye , W.H. 1997 . Land use planning and national soil policies . Agricultural systems , 53 : 161 – 174 .
- Zajdelman , F.R. 1987 . Melioracijapocv , Isdatelstvo Moskovskogo Universiteta .