A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
A S SELIM, M E RAMADAN, M M EL-SADR. "A new method for the isolation of L-alanine and L-proline from protein hydrolysates." Journal of Biological Chemistry 227.2 (1957) 871-8