TY  - JOUR
T1  - Effect of Hours of Use and Age in Years in Estimating Repair and Maintenance Costs for Two Sizes of Agricultural Tractors in Northern Sudan
JO  - Journal of Agronomy Research
VL  - 4
IS  - 2
SP  - 1
EP  - 11
PY  - 2021/2//
T2  - 
AU  - Mohamed, Hassan Dahab
AU  - Abdalla, N. O. Kheiry
AU  - Montasir, Ahmed Gafar Elfaki
SN  - 2639-3166
DO  - https://doi.org/10.14302/issn.2639-3166.jar-21-3875
UR  - https://jndc-chemistryarticles.infojar/article/1710
KW  - Repair and Maintenance
KW  - purchase price
KW  - Hours of Use
KW  - Age
KW  - Tractor
KW  - New Halfa.
ER  -