cating-oil fraction with acetic acid, p. 83 Schicktanz, S.T. <a href="http://dx.doi.org/10.6028/jres.020.044">http://dx.doi.org/10.6028/jres.020.044</a> Volumetric determination of alpha-, beta-, and gamma-cellulose in pulps and in papers containing sizing, filler, and other materials, p. 87 Launer, H.F. <a href="http://dx.doi.org/10.6028/jres.020.043">http://dx.doi.org/10.6028/jres.020.043</a> Issue 2 February 1938