1950 supplement to book of ASTM standards: including tentatives / 6 

<br/><br/><label>Subjects--Topical Terms: </label><br/><MATERIALES><AISLACION ELECTRICA><ELECTRICIDAD><PLASTICOS><GOMAS><SUPLEMENTOS><1950><NORMAS><NORMAS ASTM><ASTM STANDARDS>
<br/><br/><label>Gov. Doc. Class. No.: </label>ASTM