//-->
Corporate Social Responsibility Patterns of Small and Medium Enterprises (SMEs) Industries' Consumers: How to Improve the Situation in Sub-Saharan Africa
Sulamoyo, Nini Brenda, (2016)
6th. International report on the prevention and suppression of dust in mining, tunneling and quarrying : 1973-1977
(1982)
The quarrying industry in Northern Norway
Bjornson, Oyvind, (1985)