Charles G. Helm books & textbook
World Bibliography of Soybean Entomology, Volume II
Jenny Kogan Charles G. Helm Ellen F. Brewer & Marcos Kogan
University of Illinois /1988T Paperback / 291 Pages
Protection and Industry (Routledge Revivals)
Smith, Swire Runciman, Walter Bell, Hugh Hobson, S.G. Wadham, Arthur Long, James Helm, Elijah McLaren, Charles Bart., M.P. Burton, William Mond, Alfred "A City Editor"
Routledge /2018-07-31 Hardcover / 98 Pages
isbn-10: 1138602108 / isbn-13: 9781138602106
