Cotton flour bag (sack) towels : a recorded voluntary standard of the trade. (OCLC #890720497)
Cataloging commercial standards creates a fun opportunity to look up subject headings I’ve never used before, like:
650 _0 ǂa Dish towels ǂx Standards.
There is also a code for the Cont: fixed field for titles containing standards and specifications:
A search for an LC classification correlated to “Dish towels” produced no results (though I was pleased to see Dishwashing–Fiction nearby), but the broader term “Towels” suggested TS1781, which is for Miscellaneous textiles including bagging, shawls, towels, etc. so we have the call number:
TS1781 ǂb .C68 1951