I'd mildly prefer info about British newspapers and magazines; but would be grateful for US or European as well, if in English.
searched: this comm under journalism and 1930s tags. Wiki: History of journalism; history of newspapers and magazines; history of British newspapers; Times, photojournalism. Googled various combinations of reporters, journalists, 1930s, photojournalism, newspapers, newspaper office, depression, press, routine.(Those last three definitely didn't help.)
read Sanderson's Snow Hill. Also Wodehouse's 1915 Psmith, Journalist.
later edit: Anthony Brode's To Bed On Thursday for anyone likewise interested.