in data gathering experiments on soils mineral resources hydrology animals ... 63 48d-forestry forest description and measurement forest influences forest protection and ... for wood utilization use 71r 48e-soil sciences soil biology chemistry ... moisture mineralogy classification surveys soil ... polders tillage and fertility soil banks for irrigation use 98c for ... methods see also 77i 77a-fusion devices thermonuclear theory design ... construction and operation of devices for producing controlled thermonuclear ... for plasma studies in thermonuclear devices see also 46g 77b-isotopes ... isotopes includes isotopic irradiation devices for radioactive isotopes polluting the ... of application 77d-nuclear explosions devices explosion effects including shock waves ... into radiation belts testing of nuclear devices including nuclear simulation using ...
in data gathering experiments on soils mineral resources hydrology animals ... 63 48d-forestry forest description and measurement forest influences forest protection and ... for wood utilization use 71r 48e-soil sciences soil biology chemistry ... moisture mineralogy classification surveys soil ... polders tillage and fertility soil banks for irrigation use 98c for ... of map making 49c-electromechanical devices electric motors relays mechanical ... except those in 49e 49e-optoelectronic devices systems display systems phototubes ... use 46c 49f-power signal transmission devices transmission lines electric wire and ... and basic components 49h-semiconductor devices transistors semiconductor diodes ... beautification slope stability and soil subbases 50b-civil engineering dredging ... of concrete and cement see also 71d 50d-soil rock mechanics physical properties of ...