TY  - BOOK
AU  - Langhans, Robert W.,
AU  - Langhans,Virginia
TI  - Greenhouse management: a guide to structures, environmental control, materials handling, crop programming, and business analysis 
SN  - 0960400605
AV  - SB415 .L26
U1  - 635.9/823/068 
PY  - 1980///
CY  - Ithaca, N.Y.
PB  - Halcyon Press of Ithaca
KW  - Greenhouse management
N1  - Includes bibliographies and index
ER  -