Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
1957–58 Port Vale F.C. season
Table title:
Transfers in
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Date from </th><th colspan=1 rowspan=1 > Position </th><th colspan=1 rowspan=1 > Nationality </th><th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > From </th><th colspan=1 rowspan=1 > Fee </th><th colspan=1 rowspan=1 > Ref. </th></tr>
<tr> <td colspan=1 rowspan=1 > June 1957 </td><td class="highlighted"  colspan=1 rowspan=1 > FW </td><td colspan=1 rowspan=1 > England </td><td class="highlighted"  colspan=1 rowspan=1 > Jack Wilkinson </td><td class="highlighted"  colspan=1 rowspan=1 > Sheffield United </td><td colspan=1 rowspan=1 > Free transfer </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > July 1957 </td><td colspan=1 rowspan=1 > MF </td><td colspan=1 rowspan=1 > Scotland </td><td class="highlighted"  colspan=1 rowspan=1 > Bert Carberry </td><td class="highlighted"  colspan=1 rowspan=1 > Gillingham </td><td colspan=1 rowspan=1 > Free transfer </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > July 1957 </td><td class="highlighted"  colspan=1 rowspan=1 > GK </td><td colspan=1 rowspan=1 > Wales </td><td class="highlighted"  colspan=1 rowspan=1 > Keith Jones </td><td class="highlighted"  colspan=1 rowspan=1 > Aston Villa </td><td class="highlighted"  colspan=1 rowspan=1 > £3,500 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > July 1957 </td><td colspan=1 rowspan=1 > MF </td><td colspan=1 rowspan=1 > England </td><td class="highlighted"  colspan=1 rowspan=1 > Alan Martin </td><td colspan=1 rowspan=1 > Bangor City </td><td colspan=1 rowspan=1 > Non-contract </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > November 1957 </td><td colspan=1 rowspan=1 > MF </td><td colspan=1 rowspan=1 > England </td><td colspan=1 rowspan=1 > Bill Cleary </td><td colspan=1 rowspan=1 > Wisbech Town </td><td colspan=1 rowspan=1 > Free transfer </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > February 1958 </td><td colspan=1 rowspan=1 > FW </td><td colspan=1 rowspan=1 > Wales </td><td colspan=1 rowspan=1 > Noel Kinsey </td><td colspan=1 rowspan=1 > Birmingham City </td><td colspan=1 rowspan=1 > £5,000 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > March 1958 </td><td colspan=1 rowspan=1 > FW </td><td colspan=1 rowspan=1 > Scotland </td><td colspan=1 rowspan=1 > Jimmy McLean </td><td colspan=1 rowspan=1 > Alva Rangers </td><td colspan=1 rowspan=1 > Free transfer </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
Which signings of the 1957–58 Port Vale F.C. season occurred in June or July?
Answer:
Four of these signings were: forward Jack Wilkinson (Sheffield United); goalkeeper Keith Jones (signed from Aston Villa for £3,500); Bert Carberry (Gillingham); and Alan Martin.