Schachtzabel, E. text book Würzburg, Königl. Universitätsdruckerei H. Stürtz a.g. [1906?] 1906 German 59.86,5 Birds Pictorial works Pigeons QL696.C63 S44 1906 http://www.biodiversitylibrary.org/bibliography/50313 7467933 agr11001361 Library, U.S. Dept. of Agriculture