@article {van der Heijden:1981:0736-2935:265, title = "Impedance measurements of natural soils with an inclined track method", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "1981", volume = "1981", number = "4", publication date ="1981-10-06T00:00:00", pages = "265-270", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/1981/00001981/00000004/art00057", keyword = "24.8, 72.7.2", author = "van der Heijden, L.A.M.", abstract = "", }