APA (7th ed.) Citation

Heertjes, N. (1942). Petrological investigations of the Coalmeasures sediments of South-Limburg, the Netherlands. E. van Aelst.

Chicago Style (17th ed.) Citation

Heertjes, Nicolaas. Petrological Investigations of the Coalmeasures Sediments of South-Limburg, the Netherlands. Maastricht: E. van Aelst, 1942.

MLA (8th ed.) Citation

Heertjes, Nicolaas. Petrological Investigations of the Coalmeasures Sediments of South-Limburg, the Netherlands. E. van Aelst, 1942.

Warning: These citations may not always be 100% accurate.