Automobile: ford and general motors Trucks and tractors ended the isolation of rural America and made farming vastly more efficient. New highways and paved roads connected the nation and by 1939 the car had become a necessity to millions 1.54 Mb. 1
Rajiv gandhi university of health sciences, bangalore, karnataka Use of liquid culture (Automated) technique for recovery and identification of Mycobacteria and Drug Susceptibility Testing of Mycobacterim tuberculosis Isolated from Clinical Specimens 84.26 Kb. 1