Georg Joos ; with the collaboration of Ira M. Freeman. by Georg Joos, with the collaboration of Ira M. Freeman. by Georg Joos ; with the collaboration of IRA M. Freeman. by V. Kourganoff, with the collaboration of I.W. Busbridge. Andr鈋 Weil, with the collaboration of Maxwell Rosenlicht. Sir Hugh Ford ; part IV with the collaboration of J. M. Alexander. Hem C. Jain, with the collaboration of Genevi醗ve Laloux Jain. R. Creighton Buck, with the collaboration of Ellen F. Buck. Compiled by J.I. Rodale with the collaboration of Edward J. Fluck. Honore Alphonse Joseph pieters. With the collaboration of J. W. Creyghton.