1950 supplement to book of ASTM standards: including tentatives / 3 

<br/><br/><label>Subjects--Topical Terms: </label><br/><MATERIALES><CEMENTO><CONCRETO><CERAMICA><AISLACION TERMICA><CARRETERAS><IMPERMEABILIZACION><TIERRAS><NORMAS><NORMAS ASTM><SUPLEMENTOS><1950><ASTM STANDARDS>
<br/><br/><label>Gov. Doc. Class. No.: </label>ASTM