Hollenberg, Alvin Herbert,  1901- <br/><br/>
Farm mechanics in vocational agriculture,  a survey. 

 - [Washington]  U.S. Dept. of Health, Education, and Welfare, Office of Education  [1959] 
 - v, 28 p.  tables.  24 cm. 
 - [U.S. Office of Education] Vocational Division. Bulletin  no. 280. Agricultural series no. 74 .
 - United States.  Division of Vocational Education.  Bulletin ;  no. 280. .
<br/><br/>With : Supervision to improve instruction in distributive education / Roman F. Warmke. Washington : U.S. Dept. of Health, Education, and Welfare. Office of Education, 1959. Bound together subsequent to publication. 
<br/><br/><label>LCCN: </label>hew60000013  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural education--United States.<br/>Agricultural engineering--Study and teaching.
<br/><br/><label>LC Class. No.: </label>LC1045  / .A25 no. 280