机读格式显示(MARC)

• 000 01115nam 2200289 a 4500

• 000 1000098172

• 001 0000321480

• 005 20071129145703.0

• 008 070925s1974 ilua mb 000 0 eng d

• 020 __ |c CNY17.69

• 040 __ |a CAU |c CAU

• 090 __ |a S152.7-533/ERL

• 093 __ |a S152.7-533 |2 4

• 093 __ |a S34-533 |2 4

• 100 1_ |a Elliott, Ronald L.

• 245 12 |a A simulation model for predicting available days for soil tillage / |c by Ronald Lee Elliott.

• 260 __ |a Urbana, ILL. : |b s.l., |c 1974.

• 300 __ |a 126p. : |b ill. ; |c 30 cm.

• 500 __ |a "Submitted in partial fulfillment of the requirements for the degree of Master of Science in Agricultural Engineering in the Graduate college of the University of Illinois at Urbana-Champaign, 1974".

• 504 __ |a Includes bibliographical references (p. 91-98).

• 650 _0 |a Engineering models.

• 650 _0 |a Tillage.

• 650 _0 |a Soil mechanics.

• 901 __022007005456

• 905 __ |a CAU |f S152.7-533/ERL |b E0210682(or.)

• 907 __ |a CAU |f S152.7-533/ERL |b E0210682(or.)

• 999 __ |t A |A gxr |a 20070925 09:28:11 |I wzhlc |i 20071129 14:57:03 |G wzhlc |g 20071129 14:57:1