4 gaten in de grond

4 gaten in de grond is a rare and collectible Dutch corporate photobook published in 1961. The book documents the industrial activities of the coal mining company Maatschappij tot Exploitatie der Steenkolenmijnen Laura & Vereeniging, located in Eygelshoven. It features photography by Carel Blazer and text by Eugène Eberle, with a layout designed by Benno Wissing. The publication provides a detailed visual reportage of the mining process, including workers at work, coal transport, and processing into fine coal. The book contains 40 black-and-white photographs and is noted for its high-quality production as an industrial archive record.