Since Pickle Cars, Vinegar Cars and Salting Stations are a unique industry for a model railroad layout, and there are regular inquiries about this industry, I thought perhaps it might be useful to summarize some of the major resources available to modelers.
Without a doubt, the major resource available is the book Pickle & Vinegar Makers of the Midwest - The history and operations of two fascinating industries by David J. Leider. Self-published in 2015, the book is 140 pages chock full of prototype information, excellent prototype photos, drawings and plans along with some references to the modeling press. The book features chapers ont eh midwest pickle industry, the manufacture of pickles, pickle transport, vinegar history, vinegar manufacture and factories, vinegar transport along with numerous charts, tables and plans, including car data from selected issues of the ORER. If you're looking for THE reference on these industries and the railroad cars that served them, then this book is what you need. The book is currently available on Amazon as well as directly from the author.
If you're interested in the industry, but not at quite that level of detail, then obtain a copy of the article The Pickle Industry and Railroading, also by David J. Leider, published in the December 2011 issue of Railroad Model Craftsman.
Also an excellent reference is the article L.C.Forman Co. Pickle Tank Car by Harold W. Russell, MMR, which includes pickle tank car drawings along with prototype photos. The article was published in the NMRA's Scale Rails magazine, December 2009 issue.
For a more complete bibliography of references, please see our new Pickles & Vinegar for your Model Railroad page. There you will find additional references in the modeling press, including articles on building both pickle cars and salting stations.