A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
Niichi Hayashi, Masashi Iwata, Susumu Umemura, Toshiro Murase, Mompei Shirato. "Measurement of mechanical strength of aggregates by rod penetration method." Kagaku kogaku rombunshu 12.3 (1986) 294-300