TY - BOOK ED - American Petroleum Institute (API) ED - American Society for Testing and Materials (ASTM) ED - American National Standards Institute (ANSI) TI - Metric practice guide to the use of SI - the International system of units U1 - 389.6 PY - 1973/// CY - Washington PB - API KW - Sistema Métrico KW - Petróleo KW - Normalización KW - Estados Unidos N1 - 06292; Scope. SI units and symbols. Rules for SI style and usage. Rules for conversion and rounding. Appendixes ER -