11. A manual of soil physics Creator: Barker, Percy Bousfield. Collection: Core Historical Literature of Agriculture Publisher: Ginn and Company, Publication Place: New York : Date: 1915 Format: Book
12. Soil biology: laboratory manual Creator: Whiting, Albert Lemuel, 1885- Collection: Core Historical Literature of Agriculture Publisher: John Wiley & Sons, Publication Place: New York : Date: 1917 Format: Book
13. Methods in plant physiology: a laboratory manual and research handbook Creator: Loomis, Walter E. 1898- Collection: Core Historical Literature of Agriculture Publisher: McGraw-Hill Book Co., Publication Place: New York : Date: 1937 Format: Book
14. Soil mechanics laboratory manual: physical properties of soils. Creator: Jenkins, Herbert T. Collection: Core Historical Literature of Agriculture Publisher: Comstock Pub. Co., Publication Place: Ithaca, N.Y. : Date: 1947 Format: Book