Problem oriented computer languages for simulating engineering processesPruuden, Juhan; Tamm, Boris, inform.Information processing 68 : proceedings of IFIP Congress 1968. 11969 / p. 1484-1488 : ill https://books.google.ee/books/about/Information_Processing_68.html?id=OmjaAQAACAAJ&redir_esc=y https://www.ester.ee/record=b5694040*est