CORNELL:31924003374257

Animal waste

S. A. Witzel

PSU:000000153164

Animal waste

F. W. Duffee

WISC:89101552768

Agricultural machinery

Alvin Schwendiman / Arlie Mucks / Arthur Robert Albert / B. D. Leith / Bruce Lanpher Cartter / Clara E. Jonas / Dorothy Lillian Hussemann / E. H. Fisher / Emil Truog / F. V. Burcalow / George M. Werner / George McSpadden Briggs / George Robert Barrett / Gladys Meloche / Gustav Bohstedt / Howard Campbell Jackson / Isaac Fults Hall / Isaac Walker Rupel / James Garfield Halpin / James Guerry Moore / James Hiram Torrie / John B. Hayes / Kenneth Granville Weckel / Kenneth H. Parsons / Laurence Frederick Graber / Leland George Sorden / Leonard Austin Salter / Margaret P. McCordic / Max James LaRock / S. A. Witzel / Vearl Robert Smith / Walter A. Rowlands

WISC:89034608596

4-H clubs

S. A. Witzel

UIUC:30112019933941

Agriculture

S.A. Witzel

OCLC:1114813182

Milking parlours

S. A. Witzel / R. H. Dudgeon

WISC:89038478038

Surveying

S. A. Witzel

OCLC:81704666

S. A. Witzel

OCLC:249003054

Robert H. Grummer / Burton W. Kreitlow / E. H. Fisher / E. V. Morse / Emil Truog / Ernest Zehner / Floyd Waldo Duffee / Gladys Meloche / H. D. Bruhn / Henry Lawrence Ahlgren / Joseph S. Elfner / Lee Monroe Day / Louise A. Young / Margaret P. McCordic / Max James LaRock / Nathaniel Newton Allen / Ray Harland Roberts / Rita Dubois

WISC:89044384014

Agricultural machinery

S. A. Witzel

OCLC:7094724

Log cabins

S. A. Witzel

OCLC:809523566

Animal waste

Donald J. Hagedorn / Floyd Waldo Duffee / Laurence Frederick Graber / May L. Cowles / S. A. Witzel / University of Wisconsin. Agricultural Experiment Station / Walter Van Price

UIUC:30112019929626

Agriculture

G. E. Annin / S. A. Witzel / University of Wisconsin. Extension Service

OCLC:319170584

Poultry

R. H. Grummer / S. A. Witzel

WISC:89101552693

Swine

S. A. Witzel

OCLC:19422326

Dairying

University of Wisconsin. Extension Service / S. A. Witzel / Max James LaRock

OCLC:632759553

University of Wisconsin. Extension Service / S.A. Witzel / J.B. Hayes

OCLC:632759052

S. A. Witzel

WISC:89058779893

Farmhouses

F. W. Duffee / H. D. Bruhn / S. A. Witzel

OCLC:26377300

Sprinkler irrigation

S. A. Witzel / University of Wisconsin. Extension Service

OCLC:314404508

Electricity in agriculture

University of Wisconsin. Extension Service / G.E. Annin / S.A. Witzel

OCLC:632759949

University of Wisconsin. Extension Service / G.E. Annin / S.A. Witzel

OCLC:632759956

S. A. Witzel

OCLC:1029904788

Farm buildings

University of Wisconsin. Extension Service / R.H. Grummer / J.J. Lacey / S.A. Witzel

OCLC:632760347