If you think this means that a whole year went by without Frenkel publishing a book then you would be wrong for between the two volumes of Wave mechanics he published Statistical physics in 1933.
Kui te arvate, tähendab see, et terve aasta möödudes ilma Frenkel kirjastamine broneerida siis oleks vale kahe mahuosa Aalto mehaanika ta avaldas statistilise füüsika 1933.