Sort By:
  1. DAY-LENGTH AND TERMINATION OF PHOTOREFRACTORINESS IN THE ANNUAL TESTICULAR CYCLE OF THE TRANSEQUATORIAL MIGRANT DOLICHONYX (THE BOBOLINK)
    By: Engels, William L
    Type: Article
    In: Biol Bull
    Volume: 123
    Date: 1962-08-01
    Page Range: 94--104
    View Article
  2. THE EFFECT OF TEMPERATURE ON TESTICULAR RECRUDESCENCE IN JUNCOS AT DIFFERENT PHOTOPERIODS
    By: Engels, William L - Jenner, Charles E
    Type: Article
    In: Biol Bull
    Volume: 110
    Date: 1956-04-01
    Page Range: 129--137
    View Article
  3. MIGRATORY RESTLESSNESS IN CAGED BOBOLINKS (DOLICHONYX ORYZIVORUS, A TRANSEQUATORIAL MIGRANT)
    By: Engels, William L
    Type: Article
    In: Biol Bull
    Volume: 123
    Date: 1962-12-01
    Page Range: 542--554
    View Article
  4. PHOTOPERIODICALLY INDUCED TESTICULAR RECRUDESCENCE IN THE TRANSEQUATORIAL MIGRANT DOLICHONYX RELATIVE TO NATURAL PHOTOPERIODS
    By: Engels, William L
    Type: Article
    In: Biol Bull
    Volume: 137
    Date: 1969-10-01
    Page Range: 256--264
    View Article
  5. PHOTOPERIODISM AND THE ANNUAL TESTICULAR CYCLE OF THE BOBOLINK (DOLICHONYX ORYZIVORUS), A TRANS-EQUATORIAL MIGRANT, AS COMPARED WITH TWO TEMPERATE ZONE MIGRANTS
    By: Engels, William L
    Type: Article
    In: Biol Bull
    Volume: 120
    Date: 1961-04-01
    Page Range: 140--147
    View Article
  6. THE SIGNIFICANCE OF THE DARK PERIOD IN THE PHOTOPERIODIC RESPONSE OF MALE JUNCOS AND WHITETHROATED SPARROWS
    By: Jenner, Charles E - Engels, William L
    Type: Article
    In: Biol Bull
    Volume: 103
    Date: 1952-12-01
    Page Range: 345--355
    View Article