A piston corer for use through small ice holes
Tài liệu tham khảo
Kullenberg, 1947, The piston core sampler, Sv. Hydr.-Biol. Komm.skr., 3, 46
Ericson, 1961, Atlantic deep-sea sediment cores, Bull. Geol. Soc. Am., 72, 193, 10.1130/0016-7606(1961)72[193:ADSC]2.0.CO;2