This is particularly important in highly endemic areas. It is suitable only for institutional, professional and highly knowledgeable investors. This can be especially important for formulations composed of highly carbonaceous clays. It is used as a source of highly active magnesium. They proved to be highly competent rulers. This allows for highly efficient coding. Here, motivation is seen as key to keeping employees highly productive. It was a machine exclusively designed for racing by highly skilled riders. Work with highly enriched uranium is also conducted here. It is commonly used in applications with highly corrosive conditions. Religion can also lead to societal pressures against cohabitation especially within highly religious communities. Antlered heads are prized as trophies with larger sets being more highly prized. The officials generally proved unequal to the task of controlling this highly lucrative industry. These range from relatively egalitarian bands and tribes to complex and highly stratified chiefdoms. The Historians are in charge of collecting and preserving highly prized, often dangerous artifacts.