Gaya APA
Nyvall, Robert F.. (1979).
Field crop diseases handbook (text).
Westport:
Avi Publishing Company, Inc..
Gaya Chicago
Nyvall, Robert F..
Field crop diseases handbook.
text
Westport:
Avi Publishing Company, Inc.,
1979.
Tesis.
Gaya MLA
Nyvall, Robert F..
Field crop diseases handbook.
text
Westport:
Avi Publishing Company, Inc.,
1979.
Tesis.
Gaya Turabian
Nyvall, Robert F..
Field crop diseases handbook.
text
Westport:
Avi Publishing Company, Inc.,
1979.
Tesis.