Columbia subject headings:
Agriculture--Ukraine--History--20th century--Pictorial works.
Agriculture--Ukraine--History--20th century--Sources.
Agriculture--Ukraine--Ivankivsʹkyĭ raĭon--History--20th century--Sources.
Agriculturists--Ukraine--Ivankivsʹkyĭ raĭon--Correspondence.
Boesch, Johann--Correspondence.
Ivankivsʹkyĭ raĭon (Ukraine)--History--20th century--Sources.
Ukraine--History--20th century--Sources.
Harvard subject headings:
Agriculture--Ukraine--History--20th century--Pictorial works.
Agriculture--Ukraine--History--20th century--Sources.
Agriculture--Ukraine--Ivankivsʹkyĭ raĭon--History--20th century--Sources.
Agriculturists--Ukraine--Ivankivsʹkyĭ raĭon--Correspondence.
Boesch, Johann--Correspondence.
Ivankivsʹkyĭ raĭon (Ukraine)--History--20th century--Sources.
Ukraine--History--20th century--Sources.
Princeton subject headings: