030 1914-1918 1952- 1970- 20thcentury 21stcentury 246 allam alliedhealth alternative analytic analyticalchemistry appliedsciences astronomy atomic authority biochemical bioinformatics biologicalsciences businessintelligencetools career chemical chemicalengineering chemistry civilization computerscience congresses conservationofnaturalresources earthsciences ecology economicaspects electricity electromagnetism engineering enterpriseapplications environmental environmentalscience foodscience foodtechnology forensicmedicine forensicscience fossilfuels general generalchemistry generalhealth globalization government h91w668s1988 health healthpolicy history industrial industrialhealth industrialtechnology informationnetworks informationtechnology inorganic inorganicchemistry integratedsciences internet introductoryastronomy islam italian italy l0747305500 law magdi magnetism materialsscience medical molecular nationalism nuclear nutrition organic organicchemistry p0310406302 p0411306040 p0411306045 p0411406000 p0411706020 p0411806080 p0815909752 petroleum pharmacology philosophy physical physicalchemistry physics policysciences politicalaspects powerresources professional propaganda publichealth publicopinion regression(civilization) religiousaspects renewable resistanceto resourceallocation risk safety safetyregulations science secularism sensors socialaspects socialchange socialhistory socialmovements socialpsychology socialsciences sociologicalaspects spain specialtopics spectroscopy spectrumanalysis subatomicphysics technical technologicalinnovations technology terrorism theoretical time toxicology trade trades uncertainty war warandsociety watersupply worldwar